In this case, a group of construction-industry employers’ associations and employers (“employers”) seek relief from a broad category of enforcement actions that may be brought under the Massachusetts Earned Sick Time Law (“ESTL”), Mass. Gen. Laws ch. 149, § 148C. Specifically, the employers contend that the ESTL “is preempted” by Section 301 of the Labor-Management Relations Act, 29 U.S.C. § 185(a), “with respect” to those employers in the state who are parties to collective bargaining agreements (“CBAs”) with unions. On that basis, the employers seek a judgment “prohibiting” the Massachusetts Attorney General from “[gjranting príváte rights of action to employees who are members of collective bargaining units” and “[ejnforcing civil sanctions pursuant to [the ESTL] against employers who are signatory [sic] to collective bargaining agreements.”
The District Court dismissed the suit for failure to state a claim insofar as it constituted a facial, preemption-based challenge to the ESTL, and for want of jurisdiction on ripeness grounds insofar .as it represented an as-applied preemption-based challenge to particularized, future actions to enforce the measure. Due to the claim-specific inquiry that we must undertake in order to determine Section 301’s preemptive effect, however, we conclude that the employers’ unusual request for sweeping pre-enforcement relief is not ripe for adjudication no matter how it is best characterized along the facial/as-applied spectrum. For that reason, we dismiss the suit for want of jurisdiction.
I.
We start by describing the contours of both the Massachusetts ESTL and federal preemption under Section 301. We then will be better able to describe the basis for this suit and the District Court’s reasons for dismissing it.
A.
In 2014, voters in Massachusetts overwhelmingly approved the ESTL through the initiative process. The ESTL broke new ground in Massachusetts by providing that employers of a certain size must compensate their employees for the sick time that they use for specified purposes. Mass. Gen. Laws ch. 149, §§ 148C(a)-(d).
To ensure compliance with the ESTL, the law provides that the Attorney General “shall enforce [the law] and may obtain injunctive or declaratory relief for this purpose.” Id. at § 148C(i). That same subsection of the ESTL further provides that “[violation of [the ESTL] shall be subject to” various provisions of Massachusetts law that, among , other things, permit the imposition of civil penalties. Id.; see also id. at §§ 27C & 150.
In addition to providing for enforcement by the Attorney General, the ESTL also authorizes an “aggrieved” employee to bring actions under the ESTL, provided that such an employee first files the complaint with the Attorney General to notify her of the impending suit. Id at §§ 148C(l) & 150. After filing the complaint with the Attorney General, the aggrieved employee must wait ninety days to bring the suit unless the Attorney General permits the employee to file the suit before the ninety-day period has run. Id.
Finally, the ESTL authorizes the Attorney General to promulgate regulations “to *323 carry out the purpose and provisions” of the law. Id. at § 148C(n). The Attorney General exercised that authority on July 3, 2015 by promulgating regulations that defined certain terms in the ESTL, some of which the employers point to in pressing their preemption-based challenge. 940 C.M.R. §§ 33.01-33.11. Specifically, the ESTL provides that covered employers must compensate their employees for such paid sick time “at the same hourly rate as the employee” would have been paid had the employee not- taken leave. Mass. Gen. Laws ch. 149, § 1480(a). The regulations promulgated by the Attorney General define the “same hourly rate” to mean “the employee’s regular hourly rate” for employees paid a uniform hourly rate. 940 C.M.R. § 33.02. For “employees who receive different pay rates for hourly work from the same employer,” the regulations permit an employer to use a “blended rate, determined by taking the weighted average of all regular rates of pay over the previous pay period.” Id.
B.
Section 301 of the National Labor Relar tions Act long pre-dates the ESTL. It was enacted in 1947, and it provides: “Suits for violation of contracts between an employer and a labor organization representing employees ... may be brought in any district court of the United States having jurisdiction of the parties, without respect to the amount in controversy or without regard to the citizenship of the parties.” 29 U.S.G. § 185(a).
Notwithstanding its phrasing, Section 301 is “more than jurisdictional—[ ] it authorizes federal courts to fashion a body of federal law for the enforcement of [CBAs].” Textile Workers Union v. Lincoln Mills of Ala.,
The result is that Section 301 preempts state-law “suits alleging [CBA] violations.” Allis-Chalmers Corp. v. Lueck,
The Court has also made clear, however, that “[t]he requirements of § 301 as understood in Lucas Flour cannot vary with the name appended to a particular cause of action?’ Id. at 220,
There are limits, though, to Section 301’s preemptive reach. The Court has explained that “it would be inconsistent with congressional intent under [Section 301] to preempt state rules that ... establish rights and obligations, independent of a labor contract.” Lueck,
C.
It is against this legal background that the employers filed this suit in the U.S. District Court for the District of Massachusetts in 2015. The employers did so before any action to enforce the ESTL had been filed against any employer who is a party to a CBA by either the Attorney General or by any aggrieved employee. But the employers contend in the currently operative complaint, which is styled as “Amended Petition for Declaratory Relief II,” that Section 301 preemption nonetheless entitles them to sweeping relief from the ESTL’s eventual enforcement.
*325 Specifically, in that complaint, the employers seek “a judgment declaring that [the ESTL] is preempted with respect to employers who are signatory [sic] to collective bargaining agreements.” Second, the employers seek “a judgment prohibiting the Attorney General from: [(1)] Granting private rights of action to employees who are members of collective bargaining units; and [(2)] Enforcing civil sanctions pursuant to [the ESTL] against employers who are signatory [sic] to collective bargaining agreements,”
In support of the contention that Section' 301 preemption entitles the employers to the relief they seek, the complaint alleges the following facts. First, the complaint asserts that the construction-industry employers and the members of the construction-industry employers’ associations that bring this action are parties to CBAs. Next, the complaint alleges that “[a]ny and all state law claims brought under the [ESTL] would require a determination of the ‘hourly rate’ of a worker covered by a [CBA,] which would necessitate an analysis and interpretation of the terms of the [CBAs] made between the parties in a labor contract.” And, finally, quoting subsection (j) of the ESTL, Mass. Gen. Laws ch. 149, § 148C(j), the complaint asserts that the ESTL “further necessitates an analysis and interpretation of the terms of the [CBAs] made between the parties in a labor contract to determine whether the [ESTL] ‘diminishes, or impairs the obligations of an employer to comply with any contract, [CBA], or any employment benefit program or plan ... that provides to employees greater earned sick time rights’ ” than the ESTL.
The Attorney General responded to the employers’ suit in the District Court by moving to dismiss under both Federal Rules of Civil Procedure 12(b)(1) and 12(b)(6). The District Court ruled as follows.
Construing the complaint as a “facial preemption challenge” against the ESTL, the District Court first concluded that the employers would not be able to show that “all claims to benefits under the” ESTL for all unionized workers in the state would depend on CBA interpretation. Labor Relations Div. v. Healey, Civil Action No. 15-10116-RWZ,
The District Court then considered the employers’ challenge to the ESTL “as an' as-applied challenge” to only those enforcement actions (whether brought by the Attorney General or by employees) that would involve CBA interpretation. Id. at *8-!|!9, The District Court held, however, that, so understood, the complaint was not ripe for adjudication because, at the time the complaint was filed, “the purported application of the [ESTL] to [the employers] ha[d] been—at best—hypothetical.” Id. at *9. The District Court emphasized that no employee had, to that point, brought a claim for paid sick time under *326 the ESTL. Id. “Neither,” the District Court observed, “ha[d] the Attorney General,” Id. On this basis, the District Court concluded that the employers’ as-applied challenge “[did] not present” a justiciable case or controversy under the Article III, and therefore the District Court dismissed the case under Rule 12(b)(1) for lack of subject matter jurisdiction. Id.
The employers now appeal.
II.
Although the Attorney General does not dispute that the suit, if understood to be a facial challenge to the ESTL, is ripe for adjudication, we are obliged to determine ripeness for ourselves. See City of Fall River v. FERC,
A.
The “ ‘basic rationale’ of the ripeness inquiry is ‘to prevent the courts, through avoidance of premature adjudication, from entangling themselves in abstract disagreements’ ” in violation of Article Ill’s case or controversy requirement. Roman Catholic Bishop of Springfield v. City of Springfield,
In line with these principles, a claim is ripe only if the party bringing suit can show both that the issues raised aré fit for judicial decision at the time the suit: is filed and that the party bringing suit will suffer hardship if “court, consider,ation” is withheld, McInnis-Misenor v. Me. Med. Ctr.,
The burden to prove ripeness is on the party seeking jurisdiction. See Nulankeyutmonen Nkihtaqmikon v. Impson,
B.
We start by considering whether the employers’ pre-enforcement request for relief against the Attorney General is fit for judicial resolution. In contending that it is, the employers acknowledge that they seek relief from ESTL actions that have not yet been brought. But, they contend, Section 301 preemption would block any such suit. 3 Therefore, the employers contend that there is no reason to wait to provide them the relief they seek because, even at this early stage, the case is sufficiently developed to be adjudicated. We do not agree. 4
Unlike a typical claim of field preemption, a claim of preemption under Section 301 that is lodged against a suit to enforce a state-law cause of action, such as one granted by a measure like the ESTL, does not involve “purely legal questions, where the matter can be resolved solely on the basis of the state and federal statutes at issue.” Wis. Cent., Ltd. v. Shannon,
The Seventh Circuit’s analysis of ripeness in the quite similar preemption-based challenge presented in Shannon is instructive.
If anything, the ripeness problem is even more acute here. At this pre-enforcement stage, there is no particular claim that has been identified at all. We thus cannot perform the requisite claim-specific preemption analysis as to any claim that may be brought, as we have before us only hypothetical ESTL claims, the details of which are not known.
To the extent that the employers contend that no details about a particular ESTL claim need be known because all ESTL claims are necessarily CBA-dependent, that contention is not supported by facts alleged in the complaint. In so concluding, we may take as true the questionable statement in the employers’ complaint that “[a]ny and all state law claims brought under the [ESTL] would require a determination of the ‘hourly rate’ of a worker covered by a [CBA].” But, even if we accept that contention, we do not accept the further assertion in the employers’ complaint that all claims brought under the ESTL that require a determination of an employee’s hourly rate thereby trigger Section 301 preemption. That contention is one of law, not fact, see Iqbal,
For example, as the District Court rightly explained, ESTL enforcement actions may turn on issues concerning “liability” under the ESTL that are entirely independent of any CBA terms that may govern the hourly rate of pay for an employee, Livadas,
Similarly, we may accept as true the questionable allegation in the employers’ complaint that all claims to enforce the ESTL on behalf of unionized employees will require a court to “determine whether the [ESTL] ‘diminishes or impairs the obligations of an employer to comply with any ... [CBA] ... that provides to employees greater earned sick time rights’ ” than the ESTL. But, even if we do so, it does not
*329
follow that ESTL claims brought against the employers will depend upon the CBA. Often, the Attorney General or an aggrieved employee will be seeking relief under the ESTL that is plainly greater than the relief afforded by the CBA. In such a case, liability under the law is still determined by the ESTL and not the CBA, insofar as Section 301 “cannot be read broadly to preempt nonnegotiable rights conferred on individual employees as a matter of state law.” Livadas,
To be sure, at some point, some action may be brought under the ESTL against an employer who is a party to a CBA. And such an action may even be brought by an aggrieved employee, who is also a party to that labor agreement.
6
In the event such a suit is brought, we would know at that time the details of the actual ESTL claim presented. We therefore would be well positioned to assess whether that particular claim—though predicated on the ESTL— nevertheless depended on a provision of the governing CBA. And we would then also be able to determine whether, in com sequence, the actual claim brought should
*330
be dismissed in accord with provisions in that CBA requiring that a dispute over its terms be arbitrated or whether preemption requires instead that the claim be addressed in . some other manner. See Roman Catholic Bishop,
Our analysis under the first prong of the ripeness inquiry also dictates the outcome as to the second prong, which concerns the harm to the parties seeking. relief that would come- to those parties from our “withholding of a decision” at this time. McInnis-Misenor,
III.
Our focus on the claim-specific nature of Section 301 preemption also points
*331
the way to our resolution of the final issue that the employers raise. They contend that the District Court erred in refusing to consider certain CBAs to which some of them are parties and that had been attached to the employers’ opposition to the Attorney General’s motion to dismiss. . It is true that, “[ujnder certain ‘narrow exceptions,’ ” district courts may consider “some extrinsic documents ... without converting a motion to dismiss into a motion .for summary judgment.” Freeman v. Town of Hudson,
The employers offer no persuasive explanation for how the terms of the CBAs that the employers contend the District Court wrongly failed to consider could, on their own, meaningfully advance the preemption-based, request for relief. The employers therefore offer no account of how those .CBAs are central to their claim. The terms of those CBAs do not on their own suffice to show that those CBAs can .determine the outcome of the Section 301 inquiry without regard to the actual ESTL claim brought, nor do the employers explain how the CBAs might do so. For that reason, the preemption analysis in any actual enforcement action will necessarily depend on the specifics of the actual ESTL claim that is brought, even in a case in which one of the CBAs in question is operative. It is thus only once the specifics of an actual claim are known that it will be possible to- determine both how that claim relates to the governing CBA and how that claim may implicate Section 301 preemption. We therefore see no basis for reversing the District Court’s ruling regarding the CBAs in question, even if we were to assume, favorably to the employers, that our review of the District Court’s ruling in this regard is de novo. See id. at 36 n.5.
IV.
For these reasons, the suit .is dismissed for lack of jurisdiction.
Notes
. Even when Section 301 preempts a state-law claim, there may be different ways, of disposing of the claim. Cavallaro v. UMass Mem’l Healthcare, Inc.,
. We also acknowledge the helpful amicus briefs filed by- the City of New York, et al., the Massachusetts AFL-CIO, the Public Health Advocacy Institute et al., and SEIU Local 32BJ, et al. ■ • '
. The complaint seeks generally a declaration that the ESTL "is preempted by Section 301.” But, as we have suggested above, preemption in this context is a complex concept with varying consequences. See Livadas,
. We recognize, as the Court has recently explained, that-“[t]he doctrines of standing and ripeness ‘originate’ from the same Article III limitation,” and therefore that the ripeness analysis we undertake has commonalities with the injury-in-fact analysis we undertake when considering issues of standing. Susan B. Anthony List v. Driehaus, — U.S. —,
. It would seem likely that the employers would be the ones who would assert that some CBA-created obligation to provide greater benefits than those provided under the ESTL trumps the requirements of the ESTL. But the Court has made clear that a defense based on preemption under Section 301 may not be used to bring the underlying state-law claim into federal court. See Caterpillar Inc. v. Williams,
. Of course, the employers do also seek, in substantial part, advance relief from actions that would be brought by the Attorney General rather than by an aggrieved employee. But the Attorney General is not alleged in the employers’ complaint to be a party to any CBA and thus would not appear herself to be bound by any CBA terms, including those mandating arbitration of disputes over its meaning. Cf. Waffle House v. EEOC,
. The hardship showing is especially uncertain as to any future ESTL claim brought by the Attorney General, even if any such claim were determined to depend upon the interpretation of a provision of the CBA. After all, because the employers do not allege that the Attorney General is a party to any such CBA, the actual preemptive effect of Section 301 on any such ESTL action is far from clear. See Waffle House,
