O’SCANNLAIN, Circuit Judge:
We must decide various regulatory, statutory, and constitutional challenges to United States Postal Service policies regarding general delivery mail service and the provision of no-fee postal boxes to homeless persons.
I
Carl Currier, David Bar, and Willard Johnson are homeless persons in Seattle, Washington. Lacking physical addresses, they have found it difficult to receive mail. Although some homeless shelters will accept mail on behalf of residents, they will only hold mail for a limited time and mail theft in shelters is a recurring problem. In May and June 2000, they inquired about three United States Postal Service (the “Postal Service”) services: postal box rental, no-fee postal boxes, and general delivery. Under then-existing postal regulations, a person lacking a physical address who sought to rent a postal box had to provide a driver’s license or a verifiable point of contact (such as a homeless shelter), or, alternatively, had to be known personally by the postmaster or box clerk. See Postal Bulletin 21877 at 7 (Sept. 29, 1994).1
No-fee postal boxes are available to customers who are ineligible for carrier delivery service. See Domestic Mail Manual D910.5.1(a) (Issue 55, Jan. 10, 2000).2 For example, the Postal Service need not provide carrier services if an area has a low population density or a customer lives within a quarter-mile of a rural post office. No-fee boxes are unavailable in large cities such as Seattle because the Postal Service delivers mail to all physical addresses in the area.
General delivery service permits a person to receive mail addressed merely to his or her name, with the designation “General Delivery, [City Name].” In large cities with multiple branches, all general delivery mail is sent to one designated facility — in Seattle, the Main Post Office downtown. See id. M930.1.2 (Issue 57, June 30, 2002). The mail is held for pickup at a designated post office for thirty days. General delivery service is intended primarily to serve as a temporary means of delivery, although homeless persons may use the service indefinitely. See id. D930.1.1 (Issue 57, June 30, 2002);
These homeless persons experienced various difficulties when they attempted to take advantage of these services. The Postal Service denied Bar and Currier’s [723] request for postal box rental because they lacked physical addresses. Even after Currier submitted an identification card issued by a homeless shelter, he was still not permitted to rent a box. Johnson was allowed to rent a box after providing his driver’s license. They were all told that they were ineligible for no-fee postal boxes and that they could receive general delivery service only at the Main Post Office.
Aided by a homeless-advocacy group, Seattle Housing and Resource Effort (“SHARE”), Currier, Bar, and a third homeless person, James Kerns (not a party to this appeal), filed petitions with the Postal Service challenging the denial of these services. An Administrative Law Judge (“ALJ”) held that under the governing postal regulations they were properly denied no-fee boxes and that the Postal Service was not required to provide general delivery at locations other than the Main Post Office in downtown Seattle. The ALJ also denied Currier’s petition for postal box rental because Currier refused to use the address listed on his identification card as a point of contact and the card itself lacked a signature as required by postal regulations. The ALJ’s decision became the final administrative decision when Currier failed to appeal it within the Postal Service.
Currier, Bar, and Johnson (hereinafter collectively “Currier”) then brought suit against the Postal Service and former and current postal officials in the Western District of Washington.3 Currier alleged violations of certain postal regulations;4 the Postal Reorganization Act (“PRA”), 39 U.S.C. § 101 et seq.; the Administrative Procedure Act (“APA”), 5 U.S.C. §§ 702-706; the First Amendment’s Free Speech Clause; and the Fifth Amendment’s Due Process Clause (incorporating the Fourteenth Amendment’s Equal Protection Clause), and sought monetary damages as well as declaratory and injunctive relief.
The Postal Service moved to dismiss the action for lack of subject-matter jurisdiction and for failure to state a claim. Currier in turn filed motions for a preliminary injunction and class certification. The district court granted the Service’s motion to dismiss and denied Currier’s motions as moot. Currier timely appealed.
II
We first examine some complex jurisdictional issues, including whether sovereign immunity has been waived by the government and to what extent judicial review of administrative action may be available at all.
The district court held that “there is no waiver of immunity, no substantive legal basis and no jurisdiction over claims asserted under Postal Service regulations.” Currier v. Henderson, 190 F.Supp.2d 1221, 1227 (W.D.Wash.2002). The court also dismissed the claims brought under the APA, explaining that the PRA exempted the Postal Service from APA review. Id. at 1228.
[724] A
Currier contends that the district court erred in concluding that the Postal Service was entitled to sovereign immunity and that it lacked subject-matter jurisdiction over the Service’s alleged violation of the no-fee box regulation. The Postal Service responds by arguing that Currier possesses no private right of action to challenge postal regulations, as required by the Supreme Court’s recent decision in United States Postal Service v. Flamingo Industries (USA) Ltd., 540 U.S. 736, 124 S.Ct. 1321, 158 L.Ed.2d 19 (2004).5
The Supreme Court reminded us in Flamingo that the two-step analysis first set out in FDIC v. Meyer, 510 U.S. 471, 114 S.Ct. 996, 127 L.Ed.2d 308 (1994), governs inquiries into the Postal Service’s amenability to suit. See Flamingo, 540 U.S. at -, 124 S.Ct. at 1327. In Meyer, the Court explained that
The first inquiry is whether there has been a waiver of sovereign immunity. If there has been such a waiver ... the second inquiry comes into play — that is, whether the source of substantive law upon which the claimant relies provides an avenue for relief.
Meyer, 510 U.S. at 484, 114 S.Ct. 996. Here, the parties do not dispute that 39 U.S.C. § 401(1)6 enacts a broad waiver of sovereign immunity for the Postal Service. We must therefore decide whether Currier has a private right of action to obtain relief.
Currier urges various sources of substantive law. First, he contends that the no-fee box regulation itself comprises “the substantive law ... intended to reach the federal entity,” in the formulation of the Flamingo Court. Flamingo, 540 U.S. at -, 124 S.Ct. at 1327. Because the PRA and its implementing regulations are by definition directed at the Postal Service, he explains, Congress did not intend to exempt the Service from judicial review under them. Second, Currier argues that 39 U.S.C. § 409(a) — which declares that “district courts’ shall have original but not exclusive jurisdiction over all actions brought by or against the Postal Service” — confers a cause of action for violations of postal regulations. And finally, citing People’s Gas, Light & Coke Co. v. United States Postal Service, 658 F.2d 1182 (7th Cir.1981), he asserts that, even though the PRA broadly proscribes APA review of the Service’s actions, the statute nevertheless permits “APA-like” judicial review of regulatory claims.
[1] We are not persuaded that Congress, by enacting the PRA, intended to subject the Postal Service to suit for violations of regulations. “[A]dopted to increase the efficiency of the Postal Service and reduce political influences on its operations,” see Flamingo, 540 U.S. at -, 124 S.Ct. at 1325, the PRA converted the Postal Department into a rara avis: [725] “an independent establishment of the executive branch of the Government of the United States.” 39 U.S.C. § 201. While preserving the Service’s public obligations, the Act “indicated that [Congress] wished the Postal Service to be run more like a business than had its predecessor, the Postal Department.” Franchise Tax Bd. v. United States Postal Serv., 467 U.S. 512, 519-20, 104 S.Ct. 2549, 81 L.Ed.2d 446 (1984). Consistent with that goal, the Supreme Court has liberally construed 39 U.S.C. § 401(1)’s sue-or-be-sued clause, “presuming] that the Service’s liability is the same as that of any other business.” Id. at 520,104 S.Ct. 2549.
At the same time, the PRA provides that various forms of federal law, including the APA, that normally apply to government entities do not apply to the Service. See 39 U.S.C. § 410(a). Thus, the Service is exempt from the APA’s general mandate of judicial review of agency actions. Given this statutory backdrop, we are satisfied that the PRA evinces Congress’s general intent to withdraw judicial scrutiny of postal regulations. See Block v. Cmty. Nutrition Inst., 467 U.S. 340, 349, 104 S.Ct. 2450, 81 L.Ed.2d 270 (1984); Ruff v. Hodel, 770 F.2d 839, 840 (1985). In the face of such clear evidence, we also decline to override the PRA’s express removal of APA review of the Service’s actions by imputing an implicit Congressional intent to preserve common-law principles of judicial review. Cf. Carlin v. McKean, 823 F.2d 620, 623 (D.C.Cir.1987) (suggesting without deciding that common-law administrative review may not survive PRA’s explicit removal of APA review).
We have previously observed, moreover, that § 409(a) itself “does not confer subject matter jurisdiction for actions in which the Service is a party, but requires a ‘substantive legal framework’ of federal law to confer federal subject matter jurisdiction.” Janakes v. United States Postal Serv., 768 F.2d 1091, 1093 (9th Cir.1985). We find that a substantive legal framework is lacking here. As a regulation, the no-fee box policy does not create a private right of action of its own force. As the Supreme Court explained in Cort v. Ash:
In determining whether a private remedy is implicit in a statute not expressly providing one, several factors are relevant. First, is the plaintiff one of the class for whose especial benefit the statute was enacted — that is, does the statute create a federal right in favor of the plaintiff? Second, is there any indication of legislative intent, explicit or implicit, either to create such a remedy or to deny one? Third, is it consistent with the underlying purposes of the legislative scheme to imply such a remedy for the plaintiff? And finally, is the cause of action one traditionally relegated to state law, in an area basically the concern of the States, so that it would be inappropriate to infer a cause of action based solely on federal law?
422 U.S. 66, 78, 95 S.Ct. 2080, 45 L.Ed.2d 26 (1975) (internal quotation and citations omitted). The Court has further emphasized that the second and third factors are determinative: “Unless this congressional intent can be inferred from the language of the statute, the statutory structure, or some other source, the essential predicate for implication of a private remedy simply does not exist.” Northwest Airlines, Inc. v. Transp. Workers Union of Am., 451 U.S. 77, 94, 101 S.Ct. 1571, 67 L.Ed.2d 750 (1981).
Given Congress’s intent to insulate the Postal Service from administrative challenges and to place the Service on a business like footing, we are satisfied that the second and third factors militate against [726] our inferring a private right of action under the no-fee box regulation. See Mass. Mut. Life Ins. Co. v. Russell, 473 U.S. 134, 145, 105 S.Ct. 3085, 87 L.Ed.2d 96 (1985) (concluding that “legislative intent and consistency with the legislative scheme” trumped other factors’ support for implied right of action); In re Wash. Pub. Power Supply Sys. Sec. Litig., 823 F.2d 1349, 1354 (9th Cir.1987) (“Even if the first factor were satisfied, we find that plaintiffs have failed to clear the second and third Cort v. Ash hurdles[.]”). We therefore conclude that the district court properly dismissed Currier’s claim that the Service violated its no-fee box regulation for lack of subject-matter jurisdiction.
B
In contrast to Currier’s regulatory challenge, the district court concluded that it possessed jurisdiction to consider Currier’s claim under 39 U.S.C. § 403(c), which prohibits the Service from “makfing] any undue or unreasonable discrimination among users of the mails.”7 And we agree that the application of the Cort v. Ash factors counsels in favor of inferring a private right of action in § 403(c). As the district court correctly noted, this provision was intended to benefit consumers such as Currier, and Congress was particularly concerned with preventing the Postal Service from engaging in unreasonable discrimination. See Currier, 190 F.Supp.2d at 1228 n. 10; see also H.R.Rep. No. 91-1104 (1970), reprinted in 1970 U.S.C.C.A.N. 3649, 3682 (explaining that § 403(c) “enjoins the Postal Service from unduly or unreasonably discriminating among users or granting undue or unreasonable preferences in providing services[.]”). A private right of action alleging unreasonable discrimination under § 403(c) is therefore “consistent with the underlying purposes of the legislative scheme[.]” Cort, 422 U.S. at 78, 95 S.Ct. 2080. We therefore conclude that the district court properly exercised subject-matter jurisdiction over Currier’s statutory claim.
C
The Postal Service does not dispute that the district court had jurisdiction over Currier’s constitutional claims, see Meyer, 510 U.S. at 483, 114 S.Ct. 996, whose merits we now turn to consider.
Ill
Currier challenges the Postal Service’s general delivery and no-fee postal box regulations on First Amendment and equal protection grounds. He asserts that the Service’s provision of general delivery mail service at only Seattle’s Main Post Office — rather than at the 32 branch offices in the greater Seattle area — violates homeless persons’ First Amendment right to receive mail. By forcing those homeless persons who depend on general delivery to receive mail only at the Main Post Office, the general delivery regulation also violates the equal protection guarantees incorporated in the Fifth Amendment’s Due Process Clause. Similarly, Currier contends that the no-fee postal box regulation breaches both the First Amendment and equal protection because some people who are ineligible for carrier delivery are given free postal boxes, while the homeless, who [727] are also ineligible for carrier delivery, are not.
A
It is axiomatic that restrictions upon the mail system implicate the First Amendment. As the Supreme Court stated in Blount v. Rizzi, “The United States may give up the Post Office when it sees fit, but while it carries it on the use of the mails is almost as much a part of free speech as the right to use our tongues....” 400 U.S. 410, 416, 91 S.Ct. 423, 27 L.Ed.2d 498 (1971) (quoting U.S. ex rel. Milwaukee Soc. Democratic Pub. Co. v. Burleson, 255 U.S. 407, 437, 41 S.Ct. 352, 65 L.Ed. 704 (1921)) (Holmes, J., dissenting) (alteration in original); see also Bolger v. Youngs Drug Prods. Corp., 463 U.S. 60, 80, 103 S.Ct. 2875, 77 L.Ed.2d 469 (1983) (Rehnquist, J., concurring in the judgment) (“A prohibition on the use of the mails is a significant restriction of First Amendment rights”). The Court has not limited constitutional protection to those who seek to send mail; recipients of mail also have enforceable First Amendment rights. See Lamont v. Postmaster Gen., 381 U.S. 301, 307, 85 S.Ct. 1493, 14 L.Ed.2d 398 (1965) (holding that requiring recipient to request in writing that “communist political propaganda” be delivered to him was an “unconstitutional abridgment of the addressee’s First Amendment rights.”); Va. State Bd. of Pharmacy v. Va. Citizens Consumer Council, Inc., 425 U.S. 748, 757, 96 S.Ct. 1817, 48 L.Ed.2d 346 (1976) (acknowledging a First Amendment right to receive mailed advertising). We must therefore decide whether the burden on Currier’s First Amendment rights here rises to the level of a constitutional violation.
Our inquiry consists of the traditional tripartite forum analysis: we must first determine the relevant forum in which Currier seeks to exercise his First Amendment rights; then decide whether the forum is public or nonpublic in nature; and, finally, we must apply the appropriate level of scrutiny as dictated by the nature of the forum. See Cornelius v. NAACP Legal Def. & Educ. Fund, Inc., 473 U.S. 788, 797, 105 S.Ct. 3439, 87 L.Ed.2d 567 (1985).
Although speech forum analysis is most commonly applied to the government’s physical property, the Supreme Court has endorsed its use in considering fora defined “more in a metaphysical than in a spatial or geographic sense.” Rosenberger v. Rector & Visitors of Univ. of Va., 515 U.S. 819, 830, 115 S.Ct. 2510, 132 L.Ed.2d 700 (1995) (reimbursement program for student publication costs a limited public forum); see also Cornelius, 473 U.S. at 801, 105 S.Ct. 3439 (charitable contribution program a nonpublic forum); Perry Educ. Ass’n v. Perry Local Educators’ Ass’n, 460 U.S. 37, 48-49, 103 S.Ct. 948, 74 L.Ed.2d 794 (1983) (internal school mail system a non-public forum). In this case, Currier’s First Amendment claims depend on the existence of a similarly metaphysical forum.
[7] Currier argues that the relevant forum is the mail system as a whole. However, we are mindful of the Supreme Court’s admonition that, while the “nature and function” of the system should not be ignored, courts should “focus[ ] on the access sought by the speaker” and not the system in general. See Cornelius, 473 U.S. at 801-02, 105 S.Ct. 3439. Here, Currier seeks greater access to the general delivery mail system, contending that the service should be offered at branch post offices. Thus, the relevant forum is appropriately limited to the general delivery service, not the mail system as a [728] whole. See id. at 801, 105 S.Ct. 3439 (charitable campaign rather than federal workplace was forum where plaintiffs sought to be listed in campaign); United States Postal Serv. v. Council of Greenburgh Civic Ass’ns, 453 U.S. 114, 128, 101 S.Ct. 2676, 69 L.Ed.2d 517 (1981) (letterbox constituted relevant unit of forum analysis where plaintiffs sought to place unstamped handbills in letterboxes).
The next inquiry is whether general delivery service is a public or nonpublic forum.
a
The Supreme Court has delineated three categories of fora. Traditional public fora comprise those areas — such as streets and parks — that “have immemorially been held in trust for the use of the public and, time out of mind, have been used for purposes of assembly, communicating thoughts between citizens, and discussing public questions.” Perry, 460 U.S. at 45, 103 S.Ct. 948 (internal quotation and citation omitted). The Court has been reluctant to extend the concept to new contexts, “rejecting] the view that traditional public forum status extends beyond its historic confines.” Ark. Educ. Television Comm’n v. Forbes, 523 U.S. 666, 678, 118 S.Ct. 1633, 140 L.Ed.2d 875 (1998); see also United States v. Am. Library Ass’n, Inc., 539 U.S. 194, 206, 123 S.Ct. 2297, 156 L.Ed.2d 221 (2003) (refusing to declare Internet access in a public library either a traditional or designated public forum). The government’s ability to proscribe speech in a public forum is “sharply circumscribed.” Perry, 460 U.S. at 45, 103 S.Ct. 948. A content-based exclusion requires a showing “that [the government’s] regulation is necessary to serve a compelling state interest and that it is narrowly drawn to achieve that end.” Id. Content-neutral restrictions are reviewed under the traditional time, place, and manner test, and are thus permissible if they are “narrowly drawn to serve a significant government interest, and leave open ample channels of communication.” Id.
Designated or limited public fora8 are sites created by the government’s express dedication of its property to expressive conduct. Id. at 45-46, 103 S.Ct. 948. Such fora cannot be created by inaction, but only by an intentional governmental act. Cornelius, 473 U.S. at 802, 105 S.Ct. 3439. The government may limit the forum to certain groups or subjects— although it may not discriminate on the basis of viewpoint — and may close the fora whenever it wants. See Perry, 460 U.S. at 46, 103 S.Ct. 948. As long as the government maintains the open character of the forum, it is subject to the same constitutional strict scrutiny that must be applied to traditional public fora. See id.
If a forum does not fit into either of the two public categories, it is a nonpublic forum. In a nonpublic forum, our scrutiny is less exacting: “In addition to time, place, and manner regulations, the State may reserve the forum for its intended purposes, communicative or otherwise, as long as the regulation on speech is reasonable and not an effort to suppress expression merely because public officials oppose the speakers’s view.” Id. at 46, 103 S.Ct. 948. Such sparing treatment stems from the oft-recognized principle that the “First Amendment does not guarantee access to property simply because it [729] is owned or controlled by the government.” Id. (quoting Greenburgh, 453 U.S. at 129, 101 S.Ct. 2676); see also Int’l Soc’y for Krishna Consciousness, Inc. v. Lee, 505 U.S. 672, 678, 112 S.Ct. 2701, 120 L.Ed.2d 541 (1992); United States v. Kokinda, 497 U.S. 720, 725, 110 S.Ct. 3115, 111 L.Ed.2d 571 (1990) (plurality op.).
b
Currier argues that the mail system as a whole — and, by implication, its general delivery system — is a traditional public forum. The Postal Service responds that the general delivery service is most akin to a nonpublic forum.
The Supreme Court has resisted extending traditional public forum status beyond historic confines. See Forbes, 523 U.S. at 678, 118 S.Ct. 1633. We see no indication that general delivery mail service should stand as the equivalent of “quintessential public forums” like parks or streets. See Perry, 460 U.S. at 45, 103 S.Ct. 948. We are satisfied that, as a form of mail delivery whose particular function is to serve transient persons, general delivery lacks the hallowed history as a crucible of unfettered public debate necessary to establish traditional public forum status. See Am. Library Ass’n, 539 U.S. at 206, 123 S.Ct. 2297 (“The doctrines surrounding traditional public forums may not be extended to situations where such history is lacking.”). Given that the Court has noted that the government could eliminate postal service altogether if it so wished, see Blount, 400 U.S. at 416, 91 S.Ct. 423, we hesitate to declare a particular form of delivery a traditional public forum.
We are similarly reluctant to conclude that general delivery service is a limited public forum. To be sure, general delivery service can serve as medium for expressive activity: it is open to all members of the public without restriction and operates without regard to content or viewpoint. Nevertheless, we do not find that the Postal Service has here made “an affirmative choice to open up its property for use as a public forum.” Am. Library Ass’n, 539 U.S. at 206, 123 S.Ct. 2297. Unlike the limited public forum created by the university’s student publication reimbursement program in Rosenberger, general delivery was not set up to “encourage a diversity of views from private speakers.” Rosenberger, 515 U.S. at 834, 115 S.Ct. 2510; see also Cornelius, 473 U.S. at 805, 105 S.Ct. 3439 (“The Government did not create the[Combined Federal Campaign] for purposes of providing a forum for expressive activity. That such activity occurs in the context of the forum created does not imply that the forum thereby becomes a public forum for First Amendment purposes.”). Instead, the Service’s provision of general delivery service is meant merely to facilitate temporary mail delivery to a limited class of users.
Our conclusion that general delivery is a nonpublic forum is bolstered by our review of the Supreme Court’s case law. In Perry, the Court concluded that teacher mailboxes in a school district’s interschool mail system were not. a public forum, and that the district could therefore validly exclude unions other than the teachers’ exclusive bargaining representative from using the system. See Perry, 460 U.S. at 46, 103 S.Ct. 948. The Greenburgh Court rejected the claim that residential letter-boxes were a limited public forum. See Greenburgh, 453 U.S. at 128, 101 S.Ct. 2676. And in Kokinda, a plurality of the Court found that a sidewalk had not been dedicated to expressive activity by the Postal Service. See Kokinda, 497 U.S. at 729-30, 110 S.Ct. 3115. We have similarly found postal sidewalks to be nonpublic fora in Jacobsen v. United States Postal Serv., 993 F.2d 649, 656 (9th Cir.1992), and Monterey County [730] Democratic Cent. Comm. v. United States Postal Serv., 812 F.2d 1194, 1198 (9th Cir.1987). Viewed against this backdrop, we are satisfied that general delivery—a functional method of mail delivery—is a nonpublic forum.
When a forum is nonpublic, we review government-imposed restrictions under a reasonableness standard. “The Government’s decision to restrict access to a nonpublic forum need only be reasonable; it need not be the most reasonable or the only reasonable limitation.” Cornelius, 473 U.S. at 808, 105 S.Ct. 3439 (emphasis in original). But the government may not “restrict speech in whatever way it likes.” Forbes, 523 U.S. at 682, 118 S.Ct. 1633. Such restrictions cannot “be based on the speaker’s viewpoint and must otherwise be reasonable in light of the purpose of the property.” Id.
Here, the Postal Service’s decision to offer general delivery service at only one location is content- and viewpoint-neutral, applying to all customers equally. The Service contends that general delivery mail must be hand-sorted and requires a transaction with a person at the counter; thus, offering general delivery service at branch offices would overburden those offices’ personnel. The Postal Service further asserts that the system would be cumbersome and inefficient given the number of branch offices and zip codes at issue. Cf. Kokinda, 497 U.S. at 731, 110 S.Ct. 3115 (Postal Service regulation limiting solicitation on postal sidewalks was reasonable in view of Service’s interest in efficient mail delivery); Cornelius, 473 U.S. at 809, 105 S.Ct. 3439 (holding that limiting participation in federal charitable campaign was reasonable in order to minimize disruption in workplace); Monterey County, 812 F.2d at 1199 (Postal Service guideline prohibiting voter registration on post office sidewalks was reasonable in view of Service’s interest in avoiding appearance of involvement in political process). In light of these concerns and general delivery’s purpose as a temporary means of delivery, we conclude that the Service’s confinement of general delivery to a single Seattle location is reasonable.9
B
Currier also brings a First Amendment challenge to the Postal Service’s former and current no-fee postal box regulations.10 The former regulation made available a no-fee box to a customer ineligible for carrier delivery service “whose physical residence or business location is within the geographical delivery ZIP code boundaries administered by” a post office providing city carrier delivery. Domestic Mail Manual D910.5.1(a) (Issue 55, Jan. 10, 2000). The current regulation, revised to take into account increased security concerns, specifically requires a customer to have a physical address in order to be eligible for [731] a no-fee box. See Domestic Mail Manual D910.5.2 (Issue 57, June 30, 2002).
Because Currier seeks access to a no-fee postal box, we evaluate such boxes as the relevant fora. See Greenburgh, 453 U.S. at 128, 101 S.Ct. 2676. We are satisfied that no-fee boxes, like general delivery service, are nonpublic fora. In Green-burgh, the Supreme Court explained that residential letterboxes are non-public fora, noting that merely because “an instrumentality ‘is used for the communication of ideas or information’ ” does not make it a public forum. Id. at 130 n. 6, 101 S.Ct. 2676. Here, no-fee postal boxes constitute a similar instrumentality.
The Postal Service’s restrictions on the provision of no-fee boxes are content- and viewpoint-neutral. It points out, moreover, that no-fee boxes are intended to serve persons in areas with low population density and are thus unavailable in large cities such as Seattle, where the Postal Service delivers mail to all physical addresses in the area. It further contends that the cost of providing no-fee boxes to all homeless persons would be substantial. Given these cost concerns and the Service’s statutory mandate to provide efficient, economical service, its decision to provide no-fee boxes only to those customers who have physical addresses but are ineligible for carrier service is reasonable. Our conclusion is bolstered by the Supreme Court’s clear dismissal of the “notion that First Amendment rights are somehow not fully realized unless they are subsidized by the State.” Regan v. Taxation With Representation of Wash., 461 U.S. 540, 546, 103 S.Ct. 1997, 76 L.Ed.2d 129 (1983) (internal quotation and citation omitted); see also Lyng v. UAW, 485 U.S. 360, 369, 108 S.Ct. 1184, 99 L.Ed.2d 380 (1988) (holding that federal government is not required by First Amendment to subsidize employee’s right to express pro-union sentiments by permitting striking worker to receive food stamps); Greenburgh, 453 U.S. at 126-27, 101 S.Ct. 2676 (rejecting contention that the “First Amendment guarantees [plaintiffs] the right to deposit, without payment of postage, their notices, circulars, and flyers in letterboxes”) (emphasis added). The Service is not constitutionally obligated to provide no-fee boxes to homeless persons.
C
Currier further contends that the general delivery and no-fee box regulations offend equal protection.11 The Postal Service’s refusal to offer general delivery service at branch offices in the zip codes where the homeless reside, he argues, singles out the homeless for discriminatory treatment. And by failing to provide no-fee boxes to the homeless while simultaneously offering them to other customers ineligible for carrier delivery, it impermis-sibly discriminates against homeless customers.
Given our conclusion that the regulations do not violate the First Amendment, however, Currier’s equal protection challenge must fail. As we have explained: “[T]he viability of equal protection claims relating to expressive conduct is contingent on the existence of a public forum. Only when rights of access associated with a public forum are improperly limited may we conclude that a fundamental right is impinged.” Monterey County, 812 F.2d at 1200 (citing Perry, 460 U.S. at 54-55, 103 S.Ct. 948). Because no fundamental right of access has been violated [732] here, we evaluate whether the regulations “rationally further a legitimate public purpose.” Id. (internal quotation omitted). And our rational-basis review is quite limited: “[W]e do not require that the government’s action actually advance its stated purposes, but merely look to see whether the government could have had a legitimate reason for acting as it did.” Nat’l Ass’n for the Advancement of Psychoanalysis v. Cal. Bd. of Psychology, 228 F.3d 1043, 1051 (9th Cir.2000) (internal quotation and citation omitted).
In this case, the Postal Service’s limitation of general delivery service is a rational response to the inefficiencies and increased costs that would result from expanding general delivery to branch offices. Cf. Greenburgh, 453 U.S. at 133, 101 S.Ct. 2676 (Postal Service’s concern with maintaining efficient operations provided reasonable basis for denying First Amendment claim). Similarly, the Service’s cost-driven decision to offer no-fee boxes only to customers with physical addresses who are denied carrier service is a reasonable attempt to eliminate some disparities between customers who receive carrier delivery and those who do not. See Geduldig v. Aiello, 417 U.S. 484, 495, 94 S.Ct. 2485, 41 L.Ed.2d 256 (1974) (state may properly choose partly to remedy problem); Dandridge v. Williams, 397 U.S. 471, 487, 90 S.Ct. 1153, 25 L.Ed.2d 491 (1970) (equal protection does not require government to “attack[ ] every aspect of a problem”). We are therefore satisfied that the Service’s regulations do not violate equal protection.12
IV
For the foregoing reasons, the judgment of the district court is AFFIRMED.