OPINION OF THE COURT
Appellant Francis J. Farina brought this class action against various cell phone manufacturers and retailers of wireless handheld telephones. He appeals from the dismissal of his complaint on the ground that his claims are preempted by regulations promulgated by the Federal Communications Commission. We will affirm.
I.
Farina represents a putative class consisting of all past, current, and future Pennsylvania purchasers and lessees of cell phones who have not been diagnosed with an injury or illness resulting from their cell phone usage. Farina’s claims are based on the allegation that cell phones, as currently manufactured, are unsafe to be operated without headsets because the customary manner in which they are used — with the user holding the phone so that the antenna is positioned next to his head — exposes the user to dangerous amounts of radio frequency (“RF”) radiation. Farina alleges the marketing of cell phones as safe for use without headsets violates several provisions of Pennsylvania law.
A.
A cell phone functions by transmitting information between its low-powered radio transmitter and a base station, usually a tower containing a large antenna.
See generally Pinney v. Nokia, Inc.,
*105 The science is clear that at high levels RF radiation can cause adverse “thermal” effects resulting from the heating of human tissue. See generally FCC, Office of Engineering & Technology, Questions and Answers about Biological Effects and Potential Hazards of Radiofrequency Electromagnetic Fields, OET Bull. No. 56, 6-7 (4th ed. Aug. 1999) [hereinafter OET Bulletin], available at http://www.fcc.gov/ Bureaus/Engineering_Technology/ Documents/bulletins/oet56/oet56e4.pdf. More controversial is the purported existence of “non-thermal” effects caused by lower levels of RF radiation. Farina alleges that over the past five decades “dozens of peer reviewed research papers were published which, individually and collectively, raised serious and credible questions regarding whether the RF [radiation] to which [cell phone] users were and are exposed posed a risk or threat to their health.” Third Am. Compl. ¶ 51; see also id. ¶¶ 79-86, 90-98 (describing findings from numerous studies and laboratory tests). According to the FCC, however, “the evidence for production of harmful biological effects [from low-level RF radiation] is ambiguous and unproven.” OET Bulletin 8. Results from studies have been “inconclusive,” and “while the possibility of ‘non-thermal’ biological effects may exist, whether or not such effects might indicate a human health hazard is not presently known.” Id. In light of the present state of the science, the FCC has stated that any cell phone legally sold in the United States is a “safe” phone. App. 691.
B.
Federal regulation of radio communications can be traced back a century, to the Wireless Ship Act of 1910, ch. 379, 36 Stat. 629.
See Nat’l Broad. Co. v. United States,
The FCC’s jurisdiction extends to wireless telephone service,
see In re An Inquiry Into the Use of the Bands 825-845 MHz and 870-890 MHz for Cellular Communications Systems,
The FCC has regulated human exposure to RF emissions only since 1985.
See In re Responsibility of the F.C.C. to Consider Biological Effects of Radiofrequency Radiation,
In 1993, prompted by ANSI’s revision of its standards in collaboration with the Institute of Electrical and Electronic Engineers, Inc. (“IEEE”), the FCC began rule-making procedures to determine whether it should strengthen its regulations. See In re Guidelines for Evaluating the Environmental Effects of Radiofrequency Radiation, 8 F.C.C.R. 2849, 2849 (1993) [hereinafter NPR FCC First Order] (notice of proposed rulemaking). Among the proposed changes was the extension of RF regulations to cover cell phones. Id. at 2851. During the pendency of this notice- and-comment period, Congress passed the Telecommunications Act of 1996 (“TCA”), which directed the FCC to “make effective rules regarding the environmental effects of [RF] emissions” within 180 days of the TCA’s enactment. Pub.L. No. 104-104, § 704(b), 110 Stat. 56, 152. In addition, the TCA expanded the FCC’s authority to preempt certain state and local regulations of RF emissions. See 47 U.S.C. § 332(c).
*107 In response to the TCA, the FCC adopted a hybrid of the ANSI/IEEE standard and the standard recommended by the National Council on Radiation Protection and Measurements (“NCRP”). See In re Guidelines for Evaluating the Environmental Effects of Radiofrequency Radiation, 11 F.C.C.R. 15123, 15134-35, 15146-47 (1996) [hereinafter FCC First Order], These regulations, reflecting a “consensus view of the federal agencies responsible for matters relating to the public safety and health,” id. at 15124, limited RF emissions from cell phones for the first time, id. at 15146-47. In particular, the FCC adopted a maximum specific absorption rate (“SAR”) — which measures the amount of energy absorbed in human tissue — in “uncontrolled” 4 environments of 0.08 watts/kilogram (W/kg) as averaged over the whole-body and 1.6 W/kg spatial peak as averaged over any 1 gram of tissue, as measured for frequencies between 100 kHz and 6 GHz. Id. at 15140-41, 15146-47; see also 47 C.F.R. § 2.1093(d)(2). 5 The Commission recognized that research on the safety of RF radiation was ongoing, and pledged to monitor the science “in order to ensure that our guidelines continue to be appropriate and scientifically valid.” FCC First Order, 11 F.C.C.R. at 15125. The FCC reaffirmed the standards relevant to this case one year later. See In re Procedures for Reviewing Requests for Relief From State and Local Regulations, 12 F.C.C.R. 13494, 13505 (1997) [hereinafter FCC Second Order], The current standards are codified at 47 C.F.R. § 2.1093(d), and all cell phones sold in the United States must comply with those regulations, 47 C.F.R. §§ 2.803(a)(1), 24.51-.52.
C.
The complaint before us in this appeal is Farina’s Third Amended Complaint. The procedural history of this case is complex, winding through state court, two federal district courts, and the Judicial Panel on Multidistrict Litigation. Because the specifics of the procedural history are implicated by Farina’s challenge to our subject matter jurisdiction, we set them out in detail.
Farina initially brought this putative class action in the Philadelphia County Court of Common Pleas, asserting claims for: (1) civil conspiracy to market and sell defective cell phones by collective means, including the suppression of information regarding the health risks of RF emissions and the deliberate misleading of the public as to those risks; (2) breach of implied warranties of merchantability and fitness for a particular purpose, on the ground that cell phones sold without headsets were unsafe to use; (3) breach of express warranty of safe usage; (4) violation of the Magnuson-Moss Warranty Improvement Act, 15 U.S.C. §§ 2301-12, on the basis of breach of express and implied warranties; (5) violation of the Pennsylvania Unfair *108 Trade Practices and Consumer Protection Law; 6 and (6) a judgment under the Pennsylvania Declaratory Judgments Act, 42 Pa. Cons.Stat. § 7531, et seq., declaring that defendants’ conduct violated Pennsylvania law and requiring defendants to award the class members with headsets.
Farina filed his initial complaint on April 19, 2001. Defendants subsequently removed the case to the United States District Court for the Eastern District of Pennsylvania. Farina’s case was one of a set of parallel cases alleging defects in cell phones arising from the health risks of RF radiation that were brought in state courts in Pennsylvania, Maryland, New York, Georgia, and Louisiana. The cases were consolidated
7
by the Judicial Panel on Multidistrict Litigation and transferred to the United States District Court for the District of Maryland (“Maryland court”).
In re Wireless Tel. Radio Frequency Emissions Prods. Liab. Litig.,
The plaintiffs appealed to the Court of Appeals for the Fourth Circuit, which reversed.
Pinney,
Accordingly, because the Fourth Circuit concluded federal jurisdiction did not exist over Farina’s claims, his case was remanded back to the Court of Common Pleas. On December 23, 2005, Farina filed a Second Amended Complaint,' adding, for the first time, LG Electronics, Inc., a Korean cell phone manufacturer, and its American subsidiary, LG Electronics U.S.A., Inc. (collectively, “LG defendants”). The complaint was served on December 27, and no defendant sought removal within thirty days, as required by 28 U.S.C. § 1446(b).
Shortly after the filing of the Second Amended Complaint, LG defendants’ counsel allegedly approached Farina’s counsel, *109 seeking to drop the listed LG corporations from the suit — who purportedly had no connection to the manufacture or retail of cell phones — and substitute a different American subsidiary, LG Electronics MobileComm U.S.A., Inc. (“LG Mobile-Comm”). According to Farina, his counsel hesitated to amend the complaint, as it had filed the Second Amended Complaint only three weeks prior, and sought instead to file a Praecipe to Amend Caption and Substitute Party. But, as Farina alleges, LG defendants’ counsel insisted upon a formal amended complaint, 8 and Farina acquiesced, filing the Third Amended Complaint on February 9, 2006. The Third Amended Complaint was identical to the Second Amended Complaint in all material respects, with the exception of the replacement of LG defendants with LG Mobile-Comm.
Although LG defendants had not removed the case within thirty days of the date they were added to the Second Amended Complaint, LG MobileComm removed the action on February 17, 2006— well within 30 days of the filing of the Third Amended Complaint — -asserting jurisdiction existed under the Class Action Fairness Act, 28 U.S.C. § 1332(d). Defendants then sought to stay the proceedings pending a transfer to the Judicial Panel on Multidistrict Litigation, which the District Court granted on March 22. The case returned to the Judicial Panel on Multidistrict Litigation, which transferred the case back to the Maryland court on June 20. 9 Farina had filed a Motion to Vacate Conditional Transfer Order prior to the transfer to the Maryland court, based primarily on the absence of federal subject matter jurisdiction. The Judicial Panel on Multidistrict Litigation did not address the jurisdictional issue in its transfer order, stating “[t]he pending motion to remand to state court can be presented to and decided by the transferee judge.” App. 331. On November 10, Farina filed an Amended Motion to Remand before the Maryland court. 10 After a hearing on the motion to remand to state court, the Maryland court made no decision on the issue, instead transferring the case back to the Eastern District of Pennsylvania.
The District Court ultimately denied Farina’s motion. The court held CAFA provided grounds for federal jurisdiction, and Farina’s failure to move to remand within thirty days of LG MobileComm’s removal waived the defects in defendants’ initial failure to remove within the required thirty-day period after the filing of the Second Amended Complaint. In a separate order, the District Court addressed the merits of the preemption issue, concluding that the FCC’s regulations governing RF emissions preempted Farina’s claims. Farina timely appealed.
II.
“[E]very federal appellate court has a special obligation to ‘satisfy itself not only of its own jurisdiction, but also that of
*110
the lower courts in a cause under review. ...’”
Bender v. Williamsport Area Sch. Dist.,
A.
There' is no dispute that this case, in its current incarnation, satisfies the substantive requirements of CAFA. 11 See Def. LG MobileComm’s Notice of Removal 6-9. But CAFA is not retroactively applicable. It applies only to civil actions “commenced on or after the date of enactment,” February 18, 2005. CAFA, Pub.L. No. 109-2, § 9, 119 Stat. 4, 14 (2005) (codified as Note to 28 U.S.C. § 1332).
CAFA itself provides no definition of commencement. We have not yet addressed the issue, but most of our sister circuits have looked to state law for the definition of commencement.
See Braud v. Transp. Serv. Co. of Ill.,
We agree that state law should govern the inquiry. CAFA operates as an expansion of diversity jurisdiction.
See Bush,
The filing of an original complaint in Pennsylvania court commences an action. See Pa. R. Civ. P. 1007 (“An action may be commenced by filing with the prothonotary (1) a praecipe for a writ of summons, or (2) a complaint.”). As such, the filing of the original complaint commenced a civil action for the purposes of CAFA. Farina’s initial complaint was filed on April 19, 2001, clearly before CAFA’s enactment. But the Second Amended Complaint, filed *111 on December 23, 2005, and the Third Amended Complaint, filed on February 9, 2006, were filed after the date of CAFA’s enactment. If either of these complaints constituted the commencement of a new action, CAFA’s jurisdictional grant would apply. The issue before us, then, is whether the amendment of the original complaint in the Second Amended Complaint or the Third Amended Complaint commenced a new case.
The case law has coalesced around three approaches to the effect of amendments to complaints on CAFA commencement. The first approach, adopted by the Court of Appeals for the Ninth Circuit, ignores amendments and looks only to the filing of the original complaint for commencement.
McAtee v. Capital One, F.S.B.,
The other two approaches both apply state-law principles governing the relation-back of pleadings for statutes of limitations to determine whether an amended complaint is distinct enough from the original complaint to commence a new case.
See Prime Care,
We agree with the general approach of applying relation-back rules to at least some amendments. In doing so, we reject the approach of the Ninth Circuit in McAtee. As the Tenth Circuit recognized:
[T]he unqualified disregard of any postCAFA pleading amendments ... entails the practically untenable result that once a pre-CAFA case is filed, the plaintiff can tack on new causes of action so substantively independent of the original case that they would be properly treated as filed after CAFA’s effective date for all legal purposes ... except for CAFA.
Prime Care,
Moreover, although CAFA does not define commencement, “Congress is presumed to enact legislation with knowledge of the law and a newly-enacted statute is presumed to be harmonious with existing law and judicial concepts.”
Prime Care,
But because the result is the same under either the
Prime Care
approach or the
Braud
approach, we need not choose between the two.
13
Under Pennsylvania law,
14
a party “may at any time change the form of action, correct the name of a party or amend his pleading.” Pa.R.Civ.P. 1033. But a party may not add a “new and distinct” party after the statute of limitations has run.
Torkr-Hiis v. Commonwealth.,
Under this standard, the Second Amended Complaint commenced a new ac *113 tion. In a hearing before the District Court, Farina’s counsel conceded that LG defendants were not a party to the case prior to the Second Amended Complaint. App. 462. Because they were unrelated to any of the named defendants, the addition of LG defendants placed new assets at risk of liability and went beyond merely correcting an improper designation of a business entity. Accordingly, they constituted “new and distinct” parties. Because the Second Amended Complaint was filed after the enactment of CAFA, Farina’s claims became subject to its provisions.
Farina raises several arguments counseling against recognizing the Third Amended Complaint as the commencement of a new action. 15 Even assuming we were persuaded by these arguments, they would only establish that the Third Amended Complaint would relate back to the filing of the Second Amended Complaint. They would not establish that the Second Amended Complaint would relate back to the filing of the original complaint. Because the Second Amended Complaint was filed after the enactment of CAFA, CAFA applies and confers federal jurisdiction.
B.
Farina also argues that even if the Second Amended Complaint would have established federal jurisdiction under CAFA, the District Court lacked jurisdiction here because the removal by LG MobileComm was untimely. 16 CAFA has its own removal statute, 28 U.S.C. § 1453, which, for all pertinent purposes, imports the procedures of the general removal statute, 28 U.S.C. § 1446. Section 1446(b) requires a defendant to file for removal within thirty days of receiving a copy of the pleading setting forth the removable claim. 17
If the substitution of LG MobileComm for LG defendants in the Third Amended Complaint commenced a new case under CAFA, there is no dispute that removal was timely. The Third Amended Complaint was filed on February 9, 2006, 18 and LG MobileComm filed its notice of removal on February 17 — well within thirty days. But Farina argues the Third Amended Complaint relates back to the Second Amended Complaint, see supra note 15, and, therefore, does not constitute a commencement. The § 1446(b) time limit would then run from the date of the filing of the Second Amended Complaint, December 23, 2005, and the notice of removal would be untimely.
We need not decide whether the Third Amended Complaint relates back to
*114
the Second Amended Complaint because even if the Second Amended Complaint is the relevant date and LG MobileComm’s removal was therefore untimely, Farina waived his objection. 28 U.S.C. § 1447 provides the procedures generally applicable after removal and is explicitly adopted by CAFA,
see
28 U.S.C. § 1453(c)(1). Section 1447(c) stipulates that a remand motion made on the basis of “any defect other than lack of subject matter jurisdiction” must be filed within thirty days of the notice of removal. The failure to move to remand results in a waiver of the objection.
See Ariel Land Owners, Inc. v. Dring,
It is well settled that § 1446(b)’s thirty-day time limit for removal is a procedural provision, not a jurisdictional one.
Id.
at 614;
see also McGlinchey v. Hartford Accident & Indem. Co.,
LG MobileComm removed the ease on February 17, 2006, and, accordingly, Farina had thirty days — until March 20 — to seek a remand to state court on untimeliness grounds. As the District Court recognized, the parties dispute when the motion to remand was filed. Defendants argued below that Farina sought a remand on November 10.
19
Farina claims the remand motion was included with his motion to vacate the Judicial Panel on Multidistrict Litigation’s conditional transfer order. But this motion was entered into the docket on April 12, outside of the thirty-day time limit. Farina contends that he waited to file for remand before the Judicial Panel on Multidistrict Litigation because the motion for remand filed after his original complaint was removed in 2001 was not decided by the District Court prior to the stay of the proceedings pending transfer to the Judicial Panel on Multidistrict Litigation. Instead, it was decided by the transferee Maryland court, and he assumed a similar situation would occur once more. But regardless of Farina’s assumption, he failed to file for remand within thirty days of removal. The District Court’s stay was issued on March 22, beyond the thirty-day time limit, and could not have had an effect upon the timeliness of Farina’s remand motion. The District Court, therefore, “had no authority to remand, because [Farina’s] motion was filed more than 30 days after the notice of removal.”
Ariel Land Owners,
*115 Accordingly, federal jurisdiction exists over the case whether or not Farina is correct that the Third Amended Complaint relates back to the Second Amended Complaint. The Second Amended Complaint, which added two unrelated defendants, commenced a new civil action, as defined by Pennsylvania law, which brought the case under CAFA’s jurisdictional grant. Although the case was not removed within thirty days of the filing of the Second Amended Complaint, Farina’s failure to file for remand within thirty days of LG MobileComm’s subsequent removal waived his objections to this non-jurisdictional defect. Therefore, our review of defendants’ motion to dismiss on the grounds of preemption is proper. 20
III.
The Supremacy Clause of the United States Constitution, U.S. Const, art. VI, cl. 2, invalidates state law that “interferes with or is contrary to federal law.”
Free v. Bland,
In every preemption case, our inquiry is guided by two principles. First, the intent of Congress is the “ultimate touchstone” of preemption analysis.
Medtronic, Inc., v. Lohr,
*116
Second, we “start[] with the basic assumption that Congress did not intend to displace state law.”
Maryland v. Louisiana,
According to defendants, the presumption should not apply to Farina’s claims. They argue that federal regulation of radio communications mirrors the regulation of oil tankers at issue in
Locke.
Similar to maritime commerce, radio communications have been within the purview of Congress since the advent of the technology.
See Nat’l Broad. Co.,
But the presence of federal regulation, however longstanding, does not by itself defeat the application of the presumption. Rather, its application “accounts for the historic presence of state law but does not rely on the absence of federal regulation.”
Wyeth,
Moreover, defendants’ characterization of telecommunications as an “instrumentality of commerce” is immaterial. Nothing in the Supreme Court’s case law indicates the application of the presumption turns on whether the field regulated can be characterized as an instrumentality of commerce. This language appears to be culled
*117
from the jurisprudence governing the Commerce Clause of the United States Constitution,
see United States v. Lopez,
Accordingly, we apply the presumption against preemption to our analysis here. But although we conclude the presumption applies, we recognize it is “overcome where a Congressional purpose to preempt or the existence of a conflict is ‘clear and manifest.’ ”
Fellner,
A. 21
Defendants’ first argument for dismissal asserts that Farina’s claims are expressly preempted by the TCA. As noted, express preemption applies where Congress explicitly states in the language of the statute its intent to preempt state law.
Cipollone v. Liggett Group, Inc.,
505 U.S.
*118
504, 516,
Defendants argue 47 U.S.C. § 332(c)(7)(B)(iv) expressly preempts Farina’s claims. It provides:
No State or local government or instrumentality thereof may regulate the placement, construction, and modification of personal wireless service facilities on the basis of the environmental effects of radio frequency emissions to the extent that such facilities comply with the Commission’s regulations concerning such emissions.
Defendants argue cell phones fall within the definition of “personal wireless service facilities.” The statute itself does not provide a clear definition. “Personal wireless service facilities” are defined as “facilities for the provision of personal wireless services,” § 332(c)(7)(C)(ii), and “personal wireless services” are in turn defined as “commercial mobile services, unlicensed wireless services, and common carrier wireless exchange access services,” § 332(c)(7)(C)(i).
Defendants instead urge us to adopt a dictionary definition of “facilities” as “[t]hat which promotes the ease of any action, operation, transaction, or course of conduct.” Black’s Law Dictionary 591 (6th ed. 1990); 22 see also Webster’s Third New International Dictionary 812 (1993) (defining facility as “something that promotes the ease of any action, operation, transaction, or course of conduct”). Because cell phones enable wireless communications, defendants allege cell phones “promote the ease” of personal wireless service. But Farina cites to his own dictionary definition for “facility,” one which he argues implies a sense of permanence, as with a physical structure. See Webster’s Third New International Dictionary 812-13 (defining facility as “something (as a hospital, machinery, plumbing) that is built, constructed, installed, or established to perform some particular function or to serve or facilitate some particular end”); see also Black’s Law Dictionary 591 (defining facility as “[s]omething that is built or installed to perform some particular function”).
Because the term itself is ambiguous, we look to the broader context in which “facility” is used. That context supports Fari
*119
na’s reading. Section 332(c)(7), in which subsection (B)(iv) is included, is titled “Preservation of local zoning authority,” and subsection (B)(iv) is expressly limited to the “placement, construction, and modification” of facilities. This language suggests that the statute is directed at preempting state and local decisions with respect to the physical location of “facilities,” a reading which, as Farina contends, requires permanence.
See Pinney,
Defendants argue that even if § 332(c)(7)(B)(iv) applies only to physical infrastructure, because cell phones are the means by which that infrastructure is accessed, regulation of cell phones on the basis of RF emissions imposes restrictions on the wireless infrastructure. Defendants argue this constitutes a “back-door” regulation of infrastructure, in violation of the principles of
Rowe v. New Hampshire Motor Transport Ass’n,
But
Rowe
is inapposite here. First, the language of the preemption provision in
Rowe
was much broader than the language at issue here. That preemption provision applied to all laws “related to” motor carrier services,
id.
at 368,
Second, the burden placed on the wireless infrastructure through regulating cell phones is distinct from the burden resulting from regulating the infrastructure itself. Requiring shippers to use only those carriers who follow certain procedures is no different than requiring carriers to adopt those same procedures.
See Rowe, 552
U.S. at 372,
*121 B.
Defendants also argue that Congress’s delegation of “exclusive authority” over the field of RF emission regulation
25
preempts all state laws premised on the sufficiency of those regulations. The doctrine of field preemption applies where “the scheme of federal regulation is sufficiently comprehensive to make reasonable the inference that Congress ‘left no room’ for supplementary state regulation” or where “the field is one in which ‘the federal interest is so dominant that the federal system will be assumed to preclude enforcement of state laws on the same subject.’ ”
Hillsborough Cnty.,
While the FCC may have “primacy over the areas of technical standards and competitive market structure for cellular service,”
Cellular Commc’ns,
C.
Defendants’ final asserted ground for dismissal is conflict preemption. Conflict preemption exists (1) “where it is impossible for a private party to comply with both state and federal requirements,” or (2) “where state law stands as an obstacle to the accomplishment and execution of the full purposes and objectives of Congress.”
Fellner,
Farina’s claims rest on the allegation that defendants warranted that their cell phones were safe to operate, but that these phones were, in fact, unsafe to operate without headsets because of their emission of RF radiation — despite the fact that their emission levels were in compliance with FCC standards. Farina attempts to characterize his claims as consumer claims based only on false and misleading statements.
See
Appellant’s Br. at 52; Tr. of Oral Argument at 3;
id.
at 11;
id.
at 38. But although he disavows any challenge to the FCC’s RF standards,
see
Appellant’s Br. at 53-54; Tr. of Oral Argument at 4;
id.
at 11, that is the essence of his complaint. The representations in the advertising and instructional literature that Farina has identified as false or misleading are warranties that the phones are “safe to operate without the use of a headset and that they were and would be free from defects.” Third Am. Compl. ¶ 149;
see also id.
¶ 141. In order for Farina to succeed, he necessarily must establish that cell phones abiding by the FCC’s SAR guidelines are unsafe to operate without a headset. In other words, Farina must show that these standards are inadequate — that they are insufficiently protective of public health and safety.
See Murray v. Motorola, Inc.,
The Supreme Court’s preemption case law indicates that regulatory situations in which an agency is required to strike a balance between competing statutory objectives lend themselves to a finding of conflict preemption.
See, e.g., Buckman,
The reason why state law conflicts with federal law in these balancing situations is plain. When Congress charges an agency with balancing competing objectives, it intends the agency to use its reasoned judgment to weigh the relevant considerations and determine how best to prioritize between these objectives. Allowing state law to impose a different standard permits a re-balancing of those considerations. A state-law standard that is more protective of one objective may result in a standard that is less protective of others.
In
Geier v. American Honda Motor Co.,
for example, the Supreme Court found a suit alleging that an automobile was defectively designed because it lacked an airbag conflicted with a Department of Transportation (“DOT”) regulation authorizing manufacturers to choose between a range of passive restraint devices.
*124
Similarly, in
Buckman,
the Court preempted a tort suit premised on the defendant’s alleged fraudulent misrepresentations made to the FDA in seeking approval to market orthopedic bone screws.
Defendants argue that Farina’s suit conflicts with FCC regulations in a similar way, claiming a finding of liability would upset the balance struck by the FCC in setting its RF standards. Defendants contend that Congress delegated authority to the FCC to ensure the creation of a uniform and efficient nationwide wireless service. Allowing a jury decision to potentially set stricter RF standards, they say, would upset the FCC’s delicate balancing of efficiency and uniformity with the health and safety of the public.
The stated purpose behind the FCA is to “regulat[e] interstate and foreign commerce in communication by wire and radio so as to make available ... a rapid, efficient, Nation-wide, and world-wide wire and radio communication service with adequate facilities at reasonable charges.... ” 47 U.S.C. § 151. In setting standards for wire and radio communications, the FCC must also consider the promotion of “the safety of life and property.” 47 U.S.C. § 332(a)(1). An essential element of an efficient wireless network is a system that is subject to uniform technical standards.
See Fed. Radio Comm’n v. Nelson Bros. Bond & Mortg. Co.,
[I]t is in the national interest that uniform, consistent requirements, with adequate safeguards of the public health and safety, be established as soon as possible. Such requirements will ensure an appropriate balance in policy and will speed deployment and the availability of competitive wireless telecommunications services which ultimately will provide consumers with lower costs as well as with a greater range and options for such services.
H.R.Rep. No. 104-204(1), at 94, reprinted in 1996 U.S.C.C.A.N. at 61.
Moreover, uniformity in regulation helps ensure that adequate service is accessible throughout the country at a low cost.
See Cellular Commc’ns,
How precisely to serve these objectives “is a policy question, not a legal one.”
Cellular Phone Taskforce v. FCC,
The FCC concluded that requiring exposure to be kept as low as reasonably achievable in the face of scientific uncertainty would be inconsistent with its mandate to balance between the need to protect the public ... and the requirement that industry be allowed to provide telecommunications services to the public in the most efficient and practical manner possible.
Cellular Phone Taskforce,
This is a situation “in which the Federal Government has weighed the competing interests relevant to the particular requirement in question, reached an unambiguous conclusion about how those competing considerations should be resolved in a particular case or set of cases, and implemented that conclusion via a specific mandate on manufacturers or producers.”
Lohr,
Allowing juries to impose liability on cell phone companies for claims like Farina’s would conflict with the FCC’s regulations. A jury determination that cell phones in compliance with the FCC’s SAR guidelines were still unreasonably dangerous would, in essence, permit a jury to second guess the FCC’s conclusion on how to balance its objectives. Were the FCC’s standards to constitute only a regulatory floor upon which state law can build, juries could re-balance the FCC’s statutory objectives and inhibit the provision of quality nationwide service. Because the intensity of RF emission levels and the strength and range of cell phone signals are positively correlated, allowing additional state-law restric
*126
tions on these levels could impair the efficiency of the wireless market. But given the current state of the science, the FCC considers all phones in compliance with its standards to be safe.
See FCC First Order,
11 F.C.C.R. at 15184 (“We believe that the regulations ... represent the best scientific thought and are sufficient to protect the public health.”). These standards represent a “consensus view” of the agencies with jurisdiction over RF emissions and incorporate the views of numerous expert organizations and interested parties.
Id.
at 15124. As an agency engaged in rulemaking, the FCC is well positioned to solicit expert opinions and marshal the scientific data to ensure its standards both protect the public and provide for an efficient wireless network. Allowing juries to perform their own risk-utility analysis and second-guess the FCC’s conclusion would disrupt the expert balancing underlying the federal scheme.
See Buckman,
Moreover, the resulting state-law standards could vary from state to state, eradicating the uniformity necessary to regulating the wireless network. The wireless network is an inherently national system. In order to ensure the network functions nationwide and to preserve the balance between the FCC’s competing regulatory objectives, both Congress and the FCC recognized uniformity as an essential element of an efficient wireless network.
See
H.R. Rep. 104-204(1), at 94-95,
reprinted in
1996 U.S.C.C.A.N. at 61-62;
Cellular Commc’ns,
In concluding that state-law causes of action like Farina’s may disturb the FCC’s balance of its statutory objectives, we afford some weight to the views of the FCC itself. While we do not defer to an agency’s legal conclusion that state law is preempted, where “the subject matter is technical and the relevant history and background are complex and extensive” we defer to “an agency’s explanation of how state law affects the regulatory scheme.”
Wyeth,
Farina objects, arguing we should afford no deference to the FCC’s statements because the FCC’s position on preemption is inconsistent with its prior statements on the issue. In
Wyeth,
the Supreme Court refused to defer to the FDA’s view advocating its preemptive authority because the agency had previously asserted that state law did not erect an obstacle to the agency’s objectives.
To the extent Farina argues these statements evince the FCC’s rejection of preemption, he overreads them. First, the fact that the FCC does not possess sole jurisdiction over health and safety standards does not preclude a finding of preemption.
See City of Burbank,
*128 ■Farina raises several objections to a finding of preemption. First, he argues preemption is unwarranted because the FCC lacks authority to regulate the safety effects of RF emissions. Because the FCC is not an agency in the field of health and safety, Farina contends it cannot pass preemptive safety regulations. Moreover, he argues that, in passing its RF standards, the FCC acted pursuant to its obligations under NEPA. See, e.g., FCC Second Order, 12 F.C.C.R. at 13499 (“To meet its responsibilities under NEPA, the Commission has adopted requirements for evaluating the environmental impact of its actions. One of several environmental factors addressed by these requirements is human exposure to RF energy....” (footnote omitted)). Because NEPA applies broadly to all federal agencies and is not a statute within the FCC’s exclusive purview, he argues it cannot have preemptive effect.
But although the FCC’s RF regulations were triggered by the Commission’s NEPA obligations, health and safety considerations were already within the FCC’s mandate, 47 U.S.C. §§ 151, 332(a), and all RF regulations were promulgated under the rulemaking authority granted by the FCA,
see, e.g., FCC Second Order,
12 F.C.C.R. at 13562;
FCC First Order,
11 F.C.C.R. at 15185.
28
Furthermore, while the FCC arguably lacks the expertise to
*129
design its own scientific health and safety standards,
see Responsibility,
Farina’s second argument is that the Supreme Court’s recent opinion in
Wyeth
requires us to reject preemption here. In
Wyeth,
the plaintiff, Diana Levine, suffered injuries resulting from the administration of phenergan, an antihistamine, by the IV-push method.
The Court held Levine’s suit was not preempted by the FDA’s approval of phenergan’s label. Id. at 1204. The Court first found that Congress had long recognized a complementary role for state-law causes of action under the Food, Drug, and Cosmetic Act (“FDCA”). Id. at 1199-1200. This awareness, when paired with Congress’s refusal to enact an express preemption provision dealing with prescription drugs, indicated Congress did not intend to displace state law. Id. at 1200. Moreover, the Court refused to defer to the FDA’s current position on preemption, id. at 1201-02, and the agency itself had traditionally regarded state law as a complement to federal regulations, id. at 1202. Finally, the FDA’s approval of phenergan’s label did not reflect a balancing of competing objectives, as in cases like Geier, because the FDA had not even considered requiring a warning against the IV-push method. Id. at 1203 n. 14.
Farina argues these aspects of Wyeth support his argument against preemption. We disagree. First, there is no indication, as there was in Wyeth, that either Congress or the FCC traditionally viewed state regulation of RF emissions as a necessary complement to federal regulation. The FCC has acknowledged that traditionally little state regulation of RF emissions existed. FCC First Order, 11 F.C.C.R. at 15183 (“It would appear from the comments that a few [state and local RF] regulations have been imposed.... ”). The Commission has historically recognized a role for state law only to the extent it does not conflict with federal law, and has taken the position that state-law suits like Farina’s would conflict with its regulations. 29
*130
Moreover, the lack of an express preemption provision covering claims like Farina’s does not necessarily mean Congress intended to preserve conflicting state law. We do not read Wyeth’s reference to Congress’s decision not to enact an express preemption provision,
see id.
at 1200 (“If Congress thought state-law suits posed an obstacle to its objectives, it surely would have enacted an express preemption provision at some point during the FDCA’s 70-year history.”), as standing for the proposition that conflict preemption should not be found absent an express preemption provision. Such a reading would come too close to subsuming conflict preemption into express preemption analysis, and is inconsistent with the axiom that an express preemption provision does not “bar the ordinary working of conflict preemption principles,”
Geier,
Finally, as the Court itself recognized,
Wyeth
was not a balancing case.
Farina’s third argument posits that the presence of a savings provision in the TCA limits the preemptive authority of FCC regulations. Section 601(c)(1) of the TCA provides: “This Act and the amendments made by this Act shall not be construed to modify, impair, or supersede Federal, State, or local law unless expressly so provided in such Act or amendments.” Pub.L. No. 104-104, § 601(c)(1), 110 Stat. 56, 143 (codified as Note to 47 U.S.C. § 152). It is entitled “No Implied Effect.” Farina argues this section demonstrates Congress’s intent to limit the preemption of state law to only those situations covered by an express preemption provision. See H.R.Rep. No. 104-458, at 201 (1996), 1996 U.S.C.C.A.N. 10, 215 (Conf. Rep.) (“This provision prevents affected parties from asserting that the bill impliedly preempts other laws.”). Because neither § 332(c)(7)(B)(iv) nor § 332(c)(3)(a) reach *131 Farina’s claims, he would have us conclude his suit cannot be preempted.
Farina’s argument is not without some force. It is a possible reading of § 601(c)(1) to conclude Congress made a conscious effort to limit the scope of any subsequent preemption analysis. And because congressional intent is the “ultimate touchstone” of our inquiry,
Lohr,
Why, in any event, would Congress not have wanted ordinary pre-emption principles to apply where an actual conflict with a federal objective is at stake? Some such principle is needed. In its absence, state law could impose legal duties that would conflict directly with federal regulatory mandates.... [I]t would take from those who would enforce a federal law the very ability to achieve the law’s congressionally mandated objectives that the Constitution, through the operation of ordinary preemption principles, seeks to protect.
Id.
at 871-72,
Such a reading would be odd, then, given the fact that the FCC’s RF regulations represent a balance of competing objectives. In cases where an agency’s regulation reflects a single objective, it may make sense for Congress to declare that state law is displaced only in the specific situations covered by an express preemption provision. By doing so, Congress could ensure state law serves as a complement to federal regulation, which would further advance the agency’s statutory objective. But where the agency’s regulations represent a balance, the presence of state-law regulations does not serve as a complement, but rather re-balances the relevant considerations.
See Buckman,
Accordingly, we hesitate to read § 601(c)(1) in a way that disclaims preemption even in the face of an actual conflict. “We do not claim that Congress lacks the constitutional power to write a statute that mandates such a complex type of state/federal relationship.” Id. But where the language permits another reasonable reading, it may be more prudent to adopt that alternative rather than the one that could do violence to the statute’s objectives. It is not clear that § 601(c)(1) indicates Congress was willing to preserve state law that created actual conflicts with federal law. Even assuming that Congress may have been clarifying its intent not to preempt some state law, a clarification of intent not to preempt some state law is not a statement of intent to permit actual conflicts between state and federal law.
While the presence of a savings provision does not affect the actual workings of conflict preemption, it can provide an indication of congressional intent as to a *132 statute’s objectives. As such, a savings provision could inform our analysis of whether a conflict exists without offending the principles of conflict preemption. Section 601(c)(1), then, could indicate that Congress’s objectives are more limited than they might otherwise be characterized. While an actual conflict would still be preempted, such a conflict would be harder to find under this less expansive view of the statute’s objectives.
But this is merely one data point out of many we use to discern congressional intent, and “a narrow focus on Congress’ intent to supersede state law is misdirected, for a pre-emptive regulation’s force does not depend on express congressional authorization to displace state law.”
City of New York v. FCC,
In addition, Congress has already shown the intention to override nonuniform state-law RF standards that conflict with federal regulation of the wireless infrastructure. In passing § 332(c)(7)(B)(iv), Congress recognized that “current State and local requirements, siting and zoning decisions by non-federal units of government, have created an inconsistent and, at times, conflicting patchwork of requirements which will inhibit ... the rebuilding of a digital technology-based cellular telecommunications network.” H.R.Rep. No. 104-204(1), at 94, reprinted in 1996 U.S.C.C.A.N. at 61. The presence of inconsistent state-law regulations of the infrastructure created conflicts with the FCC’s RF regulations and led to the enactment of an express preemption provision. Congress, therefore, was clearly concerned with state-law RF standards applicable to infrastructure that threatened to limit the efficiency and uniformity of the wireless network. Cell phones are as integral to the wireless network as the infrastructure, and regulations of phones can have similar effects on the effectiveness of wireless service as regulations of the infrastructure. Cf NPR Rural, 18 F.C.C.R. at 20830 (stating that the biggest limitations on the ability of a base station to reach a cell phone are the power level of the signal and the location of the phone in relation to the base station). We think Congress would be equally concerned with state regulations of cell phones that could impose similar limitations on the range and efficiency of the wireless network. Section 601(c)(1), therefore, does not bar the preemption of Farina’s suit. 30
Farina’s final argument is that even if the FCC did strike a balance to protect safety and efficiency, the precise relief he seeks — requiring cell phones to carry headsets — would have no effect upon the efficiency of the wireless network.
31
The Fourth Circuit found this argument convincing.
See Pinney,
But we think the focus on the headset requirement is misplaced. For the purposes of preemption analysis, it is the cause of action, and not the specific relief requested, that matters. Preemption speaks in terms of claims, not in terms of forms of relief.
See, e.g., Wyeth,
Furthermore, although Farina attempts to characterize his suit as setting a headset requirement, this misapprehends the effect a finding of liability would have in this kind of suit. The nature of jury decisions is not to prescribe a specific prospective remedy. It is merely to say that defendants’ conduct does not abide by the operative legal standard — in this case, that defendants’ cell phones are unsafe — and to provide relief for the specific case or cases before the court. How defendants achieved safe levels of SAR exposure for cell phones sold in the future would be left up to them. 32 Whether they complied by reducing RF emissions or by bundling headsets with phones — or by some other means' — would be irrelevant for the purposes of the new state-law standard. In both situations, the phones would be considered “safe” under state law. Nor should the specific means of compliance matter for preemption purposes.
Accordingly, we conclude that Farina’s claims are preempted by the FCC’s RF
*134
regulations. The inexorable effect of allowing suits like Farina’s to continue is to permit juries to second-guess the FCC’s balance of its competing objectives. The FCC is in a better position to monitor and assess the science behind RF radiation than juries in individual cases. Regulatory assessments and rulemaking call upon a myriad of empirical and scientific data and medical and scientific opinion, especially in a case, such as RF radiation, where the science remains inconclusive. Though we foreclose relief for the members of this putative class, this does not render them devoid of protection. The FCC has pledged to serve an ongoing role in the regulation of RF radiation and to monitor the science in order to ensure its regulations remain adequate to protect the public. OET Bulletin at 8;
see also EMR Network v. FCC,
TV.
For the foregoing reasons, we will affirm the District Court’s dismissal of Farina’s complaint.
Notes
. The power level of a cell phone, measured in watts, is correlated with the range of a cell phone signal. See NPR Rural, 18 F.C.C.R. at 20829 (“One way to increase the range of radio systems is by increasing power levels.”); id. at 20830 (“[R]eceived signal levels decrease exponentially as the receiver moves farther from the transmitter....”). The intensity of RF radiation is measured in watts per kilogram. See 47 C.F.R. § 2.1093(d). Thus, the intensity of RF radiation is correlat *105 ed with the power level and, therefore, range. See generally FCC, Office of Engineering & Technology, Questions and Answers about Biological Effects and Potential Hazards of Radiofrequency Electromagnetic Fields, OET Bull. No. 56, 5-6 (4th ed. Aug. 1999), available at http://www.fcc.gov/Bureaus/ *106 Engineering-Technology/Documents/ bulletins/oet5 6/oet5 6e4.pdf.
. Although RF standards were issued to satisfy NEPA obligations, the regulations were promulgated pursuant to the FCC's rulemaking authority under, inter alia, 47 U.S.C. §§ 154(i) and 303(r).
. In particular, the FCC has solicited guidance on its RF regulations from the Food and Drug Administration, the Environmental Protection Agency, the Occupational Safety and Health Administration, the National Institute for Occupational Safety and Health, the National Telecommunications and Information Administration, and the Department of Defense. See OET Bulletin 27.
. The ANSI/IEEE and NCRP standards drew distinctions between exposure in "occupationar'/"controlled” environments and exposure in "general population”/"uncontrolled’’ environments, which were subsequently adopted by the FCC. Id. at 15139. The occupational/controlled exposure standard applies to individuals exposed as a result of their employment, who are fully aware of possible exposure, and can exercise control over it. Id. The general population/uncontrolled exposure standard applies to the general public or those individuals exposed as a result of their employment who are either unaware of exposure or cannot exercise control over it. Id.
. The SAR maximum for general population/uncontrolled exposure contains exemptions for exposure to the hands, wrists, feet, and ankles, at which the spatial peak SAR is 4 W/kg, as averaged over any 10 grams of tissue. 47 C.F.R. § 2.1093(d)(2).
. Farina has since voluntarily dismissed this claim, on the basis of our holding in
Hunt v. U.S. Tobacco Co.,
. The Georgia case,
Gimpelson v. Nokia, Inc.,
was pending at the time of the initial consolidation,
see In re Wireless Tel. Radio Frequency Emissions Prods. Liab. Litig.,
. This insistence was ostensibly due to Pa. R.Civ.P. 1714, which requires court approval for the discontinuation of any class action.
. The District Court listed the date of the transfer as June 26. According to the docket, the transfer order appears to have been issued on June 20.
. As the District Court recognized, there is some disagreement as to when the motion for remand was filed. Defendants argued below that the November 10 motion constituted the initial motion for remand. Farina, on the other hand, contended this motion was merely an amended motion for remand, and that the initial motion was included in the motion to vacate the transfer order, which was docketed on April 12. As discussed below, the difference between these dates is immaterial.
. CAFA grants federal jurisdiction over class actions in which the aggregate amount in controversy exceeds $5,000,000, the parties are minimally diverse, and the members of all proposed plaintiff classes are equal to or greater than 100 in number. 28 U.S.C. § 1332(d).
. Although McAtee is limited to CAFA cases filed in California, id. at 1147, much of its discussion suggests this rule has broader applicability than just to California law. The Ninth Circuit argued that relation-back principles need not be used in CAFA commencement because the substantive rights of parties are not implicated, as they would be for a statute of limitations. Id. Rather, CAFA commencement affects only the forum in which the suit takes place. Id. These arguments are not limited to an interpretation of California law, but would seemingly be applicable to any state relation-back rules.
. In fact, it is unclear how distinct these approaches are. Both the Courts of Appeals for the Fifth and the Seventh Circuits — which follow the
Braud
approach — recognize an exception to the categorical rule that an amendment adding a new defendant commences a new civil action when that addition is merely to correct a clerical misidentification of a party.
See Braud,
. Because state law governs the definition of commencement, state law should also govern the relation-back of amendments. In
Braud,
the Fifth Circuit used state law to define commencement,
. In particular, Farina argues the substitution of LG MobileComm for LG defendants was merely a correction of an improper designation of a business entity and that this substitution occurred at the insistence of LG defendants.
. Under CAFA, any defendant may remove the entire case — not just the claims asserted against that particular defendant — without the consent of any other defendant. 28 U.S.C. § 1453(b);
Brown v. Jevic,
. If the claim is not initially removable, the thirty-day period runs from the date of receipt of “a copy of the amended pleading, motion, order or other paper from which it may first be ascertained that the case is one which is or has become removable.” Id.
. Defendants state that LG MobileComm was served with the Third Amended Complaint on January 20, 2006, but the record indicates the Third Amended Complaint was dated January 27, App. 213, and docketed on February 9, App. 306. The difference between these dates is immaterial, however, as LG MobileComm’s removal was timely under any of these dates.
. On appeal, defendants cite October 15 as the date of the filing of the motion for remand. The case before the District Court was stayed at this time, and there is no docket entry in the Maryland court corresponding to this date. We assume this reference is to the November 10 filing, docketed as “Amended Motion to Remand and Memorandum for Remand.” App. 89.
. We have jurisdiction over the appeal under 28 U.S.C. § 1291. We review questions of preemption de novo.
See Deweese
v.
Nat’l R.R. Passenger Corp.,
. At the outset, Farina asserts that our preemption analysis is bound by the Fourth Circuit’s decision in
Pinney
because its rejection of conflict preemption became law of the case. The law of the case doctrine "posits that when a court decides upon a rule of law, that decision should continue to govern the same issues in subsequent stages in the same case.”
Arizona v. California,
Farina’s contention that Pinney's holding binds us here is misplaced for that reason. The Fourth Circuit made no decision on preemption for the claims brought by Farina. Although Farina's claims were initially consolidated with the other cases, they were subsequently dismissed for lack of subject matter jurisdiction.
Pinney,
Moreover, the Fourth Circuit’s rejection of the jurisdictional doctrine of complete preemption,
Pinney,
. The current Ninth edition of Black’s Law Dictionary does not contain an entry for "facility.”
. Defendants allege that if Congress intended only to preempt regulation of infrastructure, it would have said so, instead of “broadly preempting] all state regulation” based on RF emissions. Appellees' Br. at 68. This argument proves too much. Had Congress intended to preempt state regulation of cell phones, it could certainly have said so as well. Congress's statement is only “broad” if "facilities” is read to cover more than just infrastructure. We conclude it should not be.
. Although defendants do not raise it on appeal, they argued before the District Court that § 332(c)(3)(A) also expressly preempted Farina's claims. That subsection provides, in pertinent part:
[N]o State or local government shall have any authority to regulate the entry of or the rates charged by any commercial mobile service or any private mobile service, except that this paragraph shall not prohibit a State from regulating the other terms and conditions of commercial mobile services.
47 U.S.C. § 332(c)(3)(A). According to defendants’ argument below, state-law standards that add requirements with which cell phones must comply — whether in the form of specific components (i.e., headsets) or additional warnings — before being sold constitute regulations of "entry.”
Section 332 does not define what constitutes a regulation of entry, and it appears that the FCC has not clearly defined the term either.
See Peck v. Cingular Wireless, LLC,
Pinney's limited reading of “entry” is more consistent with the entire text of § 332(c)(3)(A). Moreover, it is also consistent with other provisions of the TCA. 47 U.S.C. § 253, entitled "Removal of barriers to entry,” is directed at preventing state or local regulations that "prohibit the ability of any entity to provide any interstate or intrastate telecommunications service.” Id. § 253(a); see also S.Rep. No. 104-230, at 126 (1996) (Conf. Rep.) (referring to federal prohibition of "State and local statutes and regulations, or other State and local legal requirements, that may prohibit or have the effect of prohibiting any entity from providing interstate or intrastate telecommunications services”). Regulation of entry, then, appears to refer to laws that erect obstacles to the provision of wireless services. This term would not encompass regulations of cell phones because they only reach devices that access the wire *121 less network, not devices that provide the actual wireless coverage.
. We have recognized that "although the term 'field preemption’ suggests a broad scope, the scope of a field deemed preempted by federal law may be narrowly defined."
Abdullah v. Am. Airlines, Inc.,
. In this way, Farina’s claims differ from those brought in Murray under the District of Columbia Consumer Protection Procedures Act (“CPPA”). There, the plaintiffs alleged cell phone manufacturers and retailers violated District of Columbia law by falsely representing that scientific research established "absolutely no risk of harm associated with the use of cell phones,” and by failing to inform consumers that certain measures could be taken to limit RF exposure. Id. at 784 (internal quotation marks omitted). The court concluded these claims were not preempted, as the FCC has acknowledged there is no scientific proof that cell phones have absolutely no risk of harm, id., and there is no indication that nonuniformity in disclosures to consumers would hinder FCC regulations, id. at 788-89.
Farina’s claims do not mirror the CPPA claims, however. The alleged representations made by defendants did not state that there is absolutely no risk of harm from RF radiation; they merely stated that cell phones were com *123 pliant with FCC guidelines and free from defects. See Third Am. Compl. ¶¶ 141, 149. Similarly, Farina's allegations do not posit a failure to disclose information enabling users to mitigate risk, but simply that defendants failed to disclose a defect in their phones — the level of RF emissions — that made them unsafe to operate. Murray's refusal to preempt the CPPA claims, therefore, does not affect our analysis.
. Farina also contends
Wyeth
precludes deference to agency statements made outside of notice-and-comment rulemaking procedures. In
Wyeth,
the Supreme Court refused to defer to the FDA's views in part because they were expressed in a preamble to an FDA regulation whose notice of proposed rulemaking had declared it would not contain preemptive regulations.
We do not read this passage as standing for the proposition that only statements made pursuant to notice-and-comment rulemaking can be afforded deference. The deference at issue in
Wyeth
was
Skidmore
deference,
see Skidmore v. Swift & Co.,
Although the fact that an agency’s views on preemption are expressed informally can limit the deference given,
see Fellner,
. The district court concluded that the FCC regulated cell phone RF emissions pursuant only to its authority under NEPA. The court in
Mmray
did not believe that whether the FCC promulgated its RF regulations under NEPA or "pursuant to specific radio-communications legislation,”
Murray,
. Farina also emphasizes that the Wyeth Court recognized state law as a necessary complement because the FDA lacked the resources to monitor all new information about the vast amount of pharmaceuticals on the market. See id. at 1202 & n. 11. Farina *130 argues this counsels against finding preemption here because the FDA has stated that it lacks adequate resources to regulate the health and safety effects of RF radiation. It is not clear how the sufficiency of the FDA’s resources would have an effect upon the preemptive authority of FCC regulations. Farina makes no corresponding argument that the FCC lacks sufficient resources to monitor the risks of RF emissions. Moreover, the costs of monitoring the adequacy of a generally applicable set of RF standards would presumably be far less than those of monitoring the adequacy of the labels for thousands of distinct pharmaceuticals.
. Farina also points to an additional savings provision in 47 U.S.C. § 414, providing: "Nothing in this chapter contained shall in any way abridge or alter the remedies now existing at common law or by statute....” This provision applies generally, and as such, does not provide strong evidence of the congressional objectives bound up with the regulation of RF emissions. We decline to read this provision in a way that limits our conflict preemption analysis.
. Although Farina primarily requests the provision of headsets or compensation for the cost of headsets, his complaint requests several additional forms of relief, including money *133 damages, punitive damages, and a declaratory judgment.
. We do not imply that a state statute or regulation prescribing a specific means of reducing or eliminating SAR exposure — such as one requiring a headset for all cell phones sold within a state — would not be preempted. We merely recognize that a distinction exists between the two forms of state regulation.
See Riegel,
. Farina also alleges defendants’ cell phones are defective because they represent a safety risk when used without headsets while driving. Third Am. Compl. ¶ 151. But whether or not the FCC has authority over the matter of driver safety, the effect of Farina's suit would be to require the redesign of cell phones. This presents the same conflict as his other claims. We therefore reject Farina’s driver safety argument for the same reasons as his other claims.
