This class action arises out of an allegedly unlawful attempt to collect a debt arising from an unpaid mobile phone bill. The named plaintiff, Nemesio Castro, a debtor, sued two debt collectors (collectively “the defendants”) for allegedly violating the Fair Debt Collection Practices Act (“the FDCPA”), 15 U.S.C. § 1692 et seq., by sending letters that, he claimed, threatened to sue on an approximately three-year-old debt, as to which the applicable statute of limitations had elapsed. The district court certified a class consisting of all individuals with Texas addresses who, during a certain time period, received a letter like that sent to Castro, seeking to collect a cellular telephone debt that became delinquent more than two years prior to the sending of the letter. The district court (1) granted the defendants’ motion to dismiss, or alternatively, for judgment on the pleadings; and (2) denied Castro’s motion for partial summary judgment. The district court reasoned that the Texas statute of limitations period of four years under § 16.004(a)(3) of the Texas Civil Practice & Remedies Code, 1 rather than the federal statute of limitations period of two years under 47 U.S.C. § 415(a) of the Federal Communications Act (“the FCA”), 47 U.S.C. § 151 et seq., 2 applies to the debts in the instant case, and thus that the defendants had not threatened to sue on time-barred debts. 3 Because we agree that Texas law provides the applicable limitations period for the debts in this case, we affirm the district court’s judgment.
BACKGROUND
The named plaintiff in this class action, Nemesio Castro, a resident of Texas, received two letters regarding a debt he allegedly owed to the mobile phone company Sprint PCS, based on unpaid phone bills. The letters were sent by Collecto, Inc., doing business as Collection Company of America, Inc., on behalf of U.S. Asset Management, Inc. Castro sued both companies. The defendants are in the debt collection business: U.S. Asset buys debts, and Collecto attempts to collect them. It is undisputed that the defendants are both debt collectors for the purposes of the FDCPA. 4
The plaintiffs in this case received these letters more than two years, but less than four years, after their debts became past due. The parties dispute whether actions to collect debts based on mobile phone bills are governed by a two-year statute of limitations under the FCA or a four-year statute of limitations under Texas law. The plaintiffs argue that the two-year limitations period applies, and that the letters at issue are such that an unsophisticated con *782 sumer would interpret them as threatening a lawsuit. Therefore, the plaintiffs argue, the defendants have violated the FDCPA’s prohibition on using “any false, deceptive, or misleading representation or means in connection with the collection of any debt,” 15 U.S.C. § 1692e, including “the threat to take any action that cannot legally be taken,” id. § 1692e(5), and “the use of any false representation or deceptive means to collect or attempt to collect any debt or to obtain information concerning a consumer,” id. § 1692e(10). The plaintiffs also contend that the defendants have violated the FDCPA’s provision prohibiting debt collectors from “us[ing] unfair or unconscionable means to collect or attempt to collect any debt.” Id. § 1692f.
Castro sued the defendants, alleging that they had violated the FDCPA in this manner, and moved for class certification. The district court granted the motion and certified a class consisting of all individuals with Texas addresses who received letters from the defendants between June 16, 2007, and July 6, 2008, like those sent to Castro, seeking to collect a cellular telephone debt that became delinquent more than two years prior to the sending of the letter. In its order granting the motion for class certification, the district court held that 47 U.S.C. § 415(a) sets a two-year limitations period for actions by “carriers” 5 to recover charges, and that § 415(a) preempts any state statute of limitations.
However, the district court was subsequently persuaded that § 415(a) does not apply to the plaintiffs’ debts. The court granted the defendants’ motion to dismiss, or alternatively, for judgment on the pleadings, and held that § 415(a) did not apply for two reasons. First, the district court noted that § 415(a) applies only to “actions at law by carriers for recovery of their lawful charges” (emphasis added), and concluded that “lawful charges” refers to charges that are based on “tariffs,” or rates that have been filed with the Federal Communications Commission (“the FCC”). All carriers were formerly required under the FCA to file tariffs, prior to amendments passed by Congress in 1993 and 1996. Second, the district court held that § 415(a) does not preempt statutes of limitations under state law in actions regarding matters such as billing practices and disputes, which are at issue in this case. The district court concluded that § 415(a) applies only to actions involving federally regulated matters, including the reasonableness of rates and phone companies’ entry into the market, and not to most other matters, which are exclusively governed by state law. In addition, the district court held that even if the two-year statute of limitations of § 415(a) did apply in the instant case, the defendants would be entitled to a “bona fide error” defense under the FDCPA, 15 U.S.C. § 1692k(c), because it was clearly possible for reasonable lawyers to disagree as to the applicable limitations period. Accordingly, the district court denied the plaintiffs’ motion for partial summary judgment on that issue. The plaintiffs timely appealed.
*783 STANDARD OF REVIEW
The district court granted the defendants’ motion to dismiss the complaint pursuant to Federal Rule of Civil Procedure 12(b)(6), or alternatively, for judgment on the pleadings pursuant to Federal Rule of Civil Procedure 12(c). “For both motions, this court’s standard of review is de novo, and the well-pleaded facts are viewed in the light most favorable to the plaintiff.”
Turbomeca, S.A. v. Era Helicopters, LLC,
DISCUSSION
Castro sued the defendants for violating the FDCPA, which was enacted for the following purposes:
to eliminate abusive debt collection practices by debt collectors, to insure that those debt collectors who refrain from using abusive debt collection practices are not competitively disadvantaged, and to promote consistent State action to protect consumers against debt collection abuses.
15 U.S.C. § 1692(k). The FDCPA bars debt collectors from using “any false, deceptive, or misleading representation or means in connection with the collection of any debt,”
id.
§ 1692e, including “the threat to take any action that cannot legally be taken,”
id.
§ 1692e(5), and “the use of any false representation or deceptive means to collect or attempt to collect any debt or to obtain information concerning a consumer,”
id.
§ 1692e(10). The FDCPA also prohibits debt collectors from “us[ing] unfair or unconscionable means to collect or attempt to collect any debt.”
Id.
§ 1692f. Accordingly, threatening to sue on time-barred debt may well constitute a violation of the FDCPA.
See, e.g., Freyermuth v. Credit Bureau Serv., Inc.,
Therefore, the threshold question is whether the four-year Texas statute of limitations or the two-year federal statute of limitations applies to the plaintiffs’ debts. Texas Civil Practice & Remedies Code § 16.004(a)(3) requires anyone who wishes to “bring suit on” several enumerated actions, including debt, to do so “not later than four years after the day the cause of action accrues.” In contrast, 47 *784 U.S.C. § 415(a) states: “All actions at law by carriers for recovery of their lawful charges, or any part thereof, shall be begun, within two years from the time the cause of action accrues, and not after.”
Any statute of limitations reflects a legislature’s policy decision regarding how to best balance competing interests. “The length of [a] statute of limitations is a product of a legislative weighing of competing claims of fairness — the need of plaintiffs for a reasonable amount of time within which to present their claims, and the right of defendants to be free from stale claims. Statutes of limitations also protect both the Court and the defendant from cases where the loss of evidence' — by death or disappearance of witnesses, fading memories, or disappearance of documents — may frustrate the search for truth.”
United States v. Land,
Accordingly, the question of which statute of limitations applies is a question of preemption: whether Congress intended for the outcome of its policy decision regarding these competing interests to replace that of a state legislature. We conclude that § 415(a) does not apply to the plaintiffs’ debts, because Congress has not made clear that it intended for § 415(a) to preempt state statutes of limitations with respect to actions to collect debts like those at issue here. “[T]he purpose of Congress is the ultimate touchstone in every pre-emption case.”
Wyeth v. Levine,
Starting with that assumption is appropriate in this case. Although the federal government formerly controlled telecommunications regulation nationwide, in 1993, Congress amended the FCA to permit the states to handle many aspects of regulating commercial mobile services, including billing practices and consumer protections.
6
In addition, states have traditional
*785
ly governed matters regarding contracts and consumer protections, which, on a more general level, are the issues involved in this case.
See, e.g., Gen. Motors Corp. v. Abrams,
Preemption can take multiple forms: Congress can expressly preempt state law in federal statutory language, or it can impliedly preempt state law.
Hillsborough Cnty., Fla. v. Automated Med. Labs., Inc.,
The plaintiffs do not contend that express preemption or field preemption applies in this case. Accordingly, we must decide whether conflict preemption applies. This depends on whether the term “lawful charges” in § 415(a) should be read to include non-tariffed charges or only tariffed charges. If “lawful charges” does include non-tariffed as well as tariffed charges, then we would agree with Castro that conflict preemption would apply, because the Texas statute of limitations would be in conflict with the balancing of interests expressed in the federal statute of limitations.
However, we conclude that Congress has not made clear that it intended for § 415(a) to preempt state statutes of limitations governing actions brought under state law to collect non-tariffed charges. Congress did not define “lawful charges” in the FCA. Nor does the legislative history of the FCA provide clear guidance. When the FCA was enacted in 1934, it required all carriers to file their rates, also called “tariffs,” with the FCC. 47 U.S.C. § 203(a). Under that regime, the term “lawful charges” was practically interchangeable with the term “tariffed charges,” because the only charges that any phone company could lawfully collect were those that had been filed with the FCC.
See AT&T Co. v. Cent. Office Tel., Inc.,
*786 That regime has been changed, however. Pursuant to congressional amendments to the FCA, the FCC has since released many telecommunications carriers from the requirement of filing tariffs. In 1993, Congress amended the FCA to classify commercial mobile radio service (“CMRS”) providers, a group that undisputedly includes mobile phone companies such as Sprint, as carriers subject to regulation under the FCA. Omnibus Budget Reconciliation Act of 1993, Pub.L. No. 103-66, § 6002(b)(2)(A),107 Stat. 312, 393 (codified as amended at 47 U.S.C. § 332(c)(1)). However, in that same amendment, Congress also permitted the FCC to, if it made certain findings, release CMRS providers from various requirements under the FCA, including the requirement of filing tariffs. Id. The FCC subsequently released CMRS providers from the requirement of filing tariffs. 47 C.F.R. § 20.15. In 1996, Congress also authorized the FCC to, if it made certain findings, release other telecommunications carriers from various requirements under the FCA, including the requirement of filing tariffs. Telecommunications Act of 1996, Pub.L. No. 104-104, § 401,110 Stat. 56, 128 (codified as amended at 47 U.S.C. § 160(a)). The FCC then issued several detariffing orders indicating that long-distance providers were no longer required to file tariffs. See In re Policy & Rules Concerning the Interstate, Interexchange Marketplace, Second Order on Reconsideration, 14 FCC Red. 6004 (1999); In re Policy & Rules Concerning the Interstate, Interexchange Marketplace, Order on Reconsideration, 12 FCC Red. 15,014 (1997); In re Policy & Rules Concerning the Interstate, Interexchange Marketplace, Second Report & Order, 11 FCC Red. 20,730 (1996).
Despite the fact that many telecommunications carriers were released from the requirement of filing tariffs, Congress did not change the language of § 415(a). As a result, although Congress and the FCC have drastically changed how a charge is determined to be in accordance with the law, it is unclear whether the meaning of the term “lawful charges” in § 415(a) has expanded accordingly.
One plausible interpretation of “lawful charges,” offered by the plaintiffs, is that the term encompasses charges other than tariffed charges. This interpretation relies on the ordinary meaning of the words “lawful charges.” “When terms used in a statute are undefined, we give them their ordinary meaning.”
Asgrow Seed Co. v. Winterboer,
However, it is at least equally reasonable to read “lawful charges” in § 415(a) as a term of art meaning only tariffed charges. This reading is based on the use of the word “lawfully” in another subsection of the FCA, § 415(g), which defines “overcharges.” Section 415(g) states: “The term ‘overcharges’ as used in this section shall be deemed to mean charges for services in excess of those applicable thereto under the schedules of charges lawfully on file with the Commission.” Section 415(g) can be fairly read as contrasting “overcharges,” which exceed filed tariffs, with “lawful charges,” i.e., “charges lawfully on file with the Commission,” which conform to filed tariffs. Therefore, the term “lawful charges” in § 415(a) is *787 ambiguous as to whether it refers only to tariffed charges.
Because we conclude that the meaning of “lawful charges” is ambiguous, we therefore decline to interpret the term in such a way that conflict preemption would apply. We assume that Congress did not intend to preempt “the historic police powers of the states,” absent a showing that this was “the clear and manifest purpose of Congress.”
Wyeth,
The district court’s judgment is AFFIRMED.
Notes
. Texas Civil Practice & Remedies Code § 16.004(a)(3) requires anyone who wishes to "bring suit on” several enumerated actions, including debt, to do so "not later than four years after the day the cause of action accrues.”
. 47 U.S.C. § 415(a) states: “All actions at law by carriers for recovery of their lawful charges, or any part thereof, shall be begun, within two years from the time the cause of action accrues, and not after.”
. The district court also reasoned that even if the federal statute of limitations applied and the debt was time-barred, the defendants were entitled to a "bona fide error” defense under the FDCPA.
. The FDCPA defines “debt collector” as "any person who uses any instrumentality of interstate commerce or the mails in any business the principal purpose of which is the collection of any debts, or who regularly collects or attempts to collect, directly or indirectly, debts owed or due or asserted to be owed or due another,” with certain exceptions that do not apply here. 15 U.S.C. § 1692(a)(6).
. A "carrier,” also referred to as a "common carrier,” is defined in the FCA as follows: "any person engaged as a common carrier for hire, in interstate or foreign communication by wire or radio or interstate or foreign radio transmission of energy, except where reference is made to common carriers not subject to this chapter; but a person engaged in radio broadcasting shall not, insofar as such person is so engaged, be deemed a common carrier.” 47 U.S.C. § 153. The parties do not dispute that Sprint and other mobile phone companies are "carriers” and that the defendants, who bought the plaintiffs’ debts from mobile phone companies, must stand in those companies’ shoes and be treated as "carriers” under federal law.
. The 1993 amendment states in relevant part that “Notwithstanding [certain exceptions], no 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.” Omnibus Budget Reconciliation Act of 1993, Pub.L. No. 103-66, § 6002(b)(2)(A), 107 Stat. 312, 393 (codified as amended at 47 U.S.C. § 332(c)(3)) (emphasis added). The legislative history of this subsection indicates that "terms and conditions” includes “such matters as customer billing information and practices and billing disputes and other consumer protection matters .... This list is intended to be illustrative only and not meant to preclude other matters generally understood to fall under *785 ‘terms and conditions.' ” H.R.Rep. No. 103-111, at 261 (1993), reprinted in 1993 U.S.C.C.A.N. 378, 588.
. The plaintiffs cite
Boomer v. AT&T Corp.,
