ANDERSON, Circuit Judge.
This case involves the adequacy of funding provided by the United States to plaintiffs, two Native American Tribes, for their performance of contracts operated under the Indian Self-Determination and Education Assistance Act. The Tribes appeal the grant of summary judgment to the United States. We affirm.
BACKGROUND
Under the Indian Self-Determination and Education Assistance Act (“ISDA”), 25 U.S.C. §§ 45(M50(n), as amended, the Secretary of Health and Human Services (“Secretary”) may enter into contracts or compacts with Indian tribes (self-determination contracts) to permit the tribes to administer various programs that the Secretary would otherwise administer. The Act further stipulates that the Secretary will provide funding for the administration of those programs. The basic idea behind the ISDA is to promote tribal autonomy and self-determination by permitting tribes to operate programs previously operated by the federal government, but to ensure that they do not suffer a reduction in funding for those programs simply because they assume direct operation of them.
The Indian Health Service (“IHS”) provides primary health care for Indians and Alaska natives throughout the United States. In fiscal year 1994, in accordance [1056]*1056with the ISDA, plaintiffs, the Shoshone-Paiute and the Cherokee Nation Tribes of the Duck Valley Reservation, entered into Compacts of Self-Governance and associated Annual Funding Agreements with the Secretary to operate certain IHS programs for their members.
Under § 450j-l(a) of the ISDA, the Secretary is obligated to provide funding for those self-determination contracts or compacts 1 in an amount equal to what he would have provided were IHS to continue to provide health care services itself directly. This is called the “Secretarial amount.” 25 U.S.C. § 450j — 1(a)(1). See Ramah Navajo Sch. Bd., Inc. v. Babbitt, 87 F.3d 1338, 1341 (D.C.Cir.1996) (describing the Secretarial amount as the “amount of funding that would have been appropriated for the federal government to operate the programs if they had not been turned over to the Tribe”).
In addition to the Secretarial amount, the ISDA directs the Secretary to provide contract support costs (“CSC”) to cover the direct and indirect expenses associated with operating the programs. The ISDA does not precisely define what CSC are.2 We have observed that “[r]eviewing ... the [ISDA] as a whole, ... ‘contract support costs’ encompasses ‘indirect costs’ incurred by a tribal organization in carrying out a self-determination contract.” Ramah Navajo Chapter v. Lujan, 112 F.3d 1455, 1461 (10th Cir.1997). “Indirect costs” are, in turn, defined as those “incurred for a common or joint purpose benefiting more than one .contract objective ...,” 25 U.S.C. § 450b(f), as contrasted with “direct program costs,” which are those “that can be identified specifically with a particular contract objective,” 25 U.S.C. § 450b(c). See Shoshone-Bannock Tribes v. Secretary, 279 F.3d 660, 663 n. 5 (9th Cir.2002); Ramah Navajo Chapter, 112 F.3d at 1457-58. As this case demonstrates, the adequacy of the funding provided for tribal indirect costs has proven to be a recurring and troublesome issue. See Ramah Navajo Chapter, 112 F.3d at 1462 (“The legislative history indicates one of the primary concerns of Congress in enacting the [1988] amendments [to the ISDA] was the chronic underfunding of tribal indirect costs.”) (citing S.Rep. No. 100-274 at 8-13 (1987), U.S. Code Cong. & Admin. News 2620, 2627-2632). See United States General Accounting Office, Indian Self-Determination Act: Shortfalls in Indian Contract Support Costs Need to Be Addressed at p. 3 (June 1999) (noting that while “Tribes’ allowable contract support costs have tripled from 1989 through 1998 — increasing from about $125 million to about $375 million.... Congress has not funded contract support to keep pace with these increases, resulting in funding shortfalls”).
The ISDA provides a further and, in this case, significant caveat to the funding obli[1057]*1057gations: “Notwithstanding any other provision in this subchapter, the provision of funds under this subchapter is subject to the availability of appropriations and the Secretary is not required to reduce funding for programs, projects, or activities serving a tribe to make funds available to another tribe or tribal organization under this subchapter.” 25 U.S.C. § 450j-l(b); see also 25 U.S.C. § 450j(c) (“The amounts of [self-determination] contracts shall be subject to the availability of appropriations”). The first clause in § 450j-l(b) is called the “availability clause” and the second the “reduction clause.”
Additionally, every self-determination contract entered into under the ISDA must either contain or incorporate by reference the provisions of a model agreement prescribed by the ISDA. 25 U.S.C. § 4.501(a). The model agreement reiterates the availability clause, specifically providing that the amount funded by the Secretary is “[sjubject to the availability of appropriations.... ” 25 U.S.C. § 450l(c) (describing § 1(b)(4) of model agreement). Accordingly, the compact with the Shoshone-Paiute Tribe contained the following clause:
Funding Amount. Subject only to the appropriation of funds by the Congress of the United States and to adjustments pursuant to [25 U.S.C. § 450j-l] of the Indian Self-Determination and Education Assistance Act, as amended, the Secretary shall provide the total amounts specified in the Annual Funding Agreement.
Appellants’ App. at 302. The compact with the Cherokee Nation contained virtually identical language. See icL at 425.
Additionally, the Annual Funding Agreement between the Shoshone-Paiutes and the Secretary included the following provision:
Section 9 — Adjustments.
(a) Due to Congressional Actions. The parties to this Agreement recognize that the total amount of the funding in this Agreement is subject to adjustment due to Congressional action in appropriations Acts or other laws affecting availability of funds to the Indian Health Service and the Department of Health and Human Services. Upon enactment of any such Act or law, the amount of funding provided to the Tribes in this Agreement shall be adjusted as necessary, after the Tribes have been notified of such pending action and subject to any rights which the Tribes may have under this Agreement, the Compact, or the law.
Appellants’' App. at 342. The Annual Funding Agreement between the Cherokee Nation and the Secretary stated as follows:
The parties agree that adjustments may be appropriate due to unanticipated Congressional action. Upon enactment of relevant Appropriations Acts, the adjustments may be negotiated as necessary; provided, however, the Nation shall be notified and consulted in advance of any proposed adjustments. It is recognized by the parties that circumstances may arise where funding variances or other changes or modifications may be needed, and the parties' shall negotiate same in good faith. Provided, however, this AFA shall not be modified to decrease or delay any funding except pursuant to mutual agreement of the parties.
Appellants’ App. at 450.
Recognizing that there could be numerous tribes competing for funding, the ISDA gave the IHS some flexibility in determining how to allocate funds: “[payments of any grants or under any contracts pursuant to section 450f and 450h of [1058]*1058this title may be made in advance or by way of reimbursement and in such installments and on such conditions as the appropriate Secretary deems necessary to carry out the purposes of this part.” 25 U.S.C. § 450j(b). This case concerns a dispute about the allocation of CSC funds to the plaintiff Tribes for fiscal years 1996 and 1997.
In allocating CSCs for those years, IHS categorized contracts with-tribes into two broad groups — “existing” contracts and “new or expanded” contracts.3 Existing contracts were those that a tribe had been operating in a prior year or years. IHS allocated CSCs to existing contracts generally in accordance with the recommendations contained in appropriation committee reports. New or expanded contracts were those involving programs which tribes had never operated before. With respect to these new or expanded contracts, IHS took the ISD Fund Congress had appropriated for the “transitional costs of initial or expanded tribal contracts” and established a priority list based on the date the tribe requested funding for a new or expanded contract. Each year IHS would fully pay for CSCs for new or expanded contracts at the top of the priority list, and continue down the list until the ISD Fund was fully depleted. Contracts that had been so funded were removed from the list, and those below it advanced. In practice, the funds for new or expanded contracts were depleted before every tribe on the priority list received its CSC funding for new or expanded programs.
At the end of each year, the IHS would summarize the full CSC needs of each contracting tribe, in the prior year, 'caleu-late how much the IHS paid toward those CSC needs, and determine the resulting shortfall, if any. The Director of the Division of Financial Management for the IHS stated that in 1997 there was a CSC funding shortfall of $81,996,000 and in 1996 a CSC funding shortfall of $43,000,000. Fitzpatrick Decl. at ¶ 8, Appellants’ App. at 530.
As indicated, this case concerns a dispute' about the amount of CSCs provided to the plaintiff Tribes in fiscal years 1996 and 1997.4 For fiscal year 1996, the House Committee on Appropriations recommended that approximately $1.7 billion be appropriated to IHS, with $153 million to be spent on CSCs for existing self-determination contracts, and $7.5 million on such costs for new or expanded self-determination contracts. See H.R.Rep. No. 104-173, at 97 (1995). As actually enacted, the Appropriations Act for 1996 appropriated the recommended $1.7 billion, of which approximately $1,374 billion was unrestricted. Of that $1,374 billion, however, $7.5 million “shall remain available until expended, for the Indian Self-Determination Fund, which shall be available for the transitional costs of initial or expanded tribal contracts, grants or cooperative agreements with the Indian Health Service under the provisions of the Indian Self-Determination Act.” Omnibus Consolidated Rescissions and Appropriations Act of 1996, Pub.L. No. 104-134, 110 Stat. 1321-189 (1996).
For fiscal year 1997, Congress similarly appropriated a lump sum of approximately $1.8 billion to IHS for administration of the ISDA, of which $160,000,000 had been [1059]*1059earmarked by the appropriations committee report for CSCs for existing contracts. See S.Rep. No. 104-319, at 90 (1996). As with the 1996 appropriation, in the actual Appropriations Act, Congress appropriated the recommended $1.8 billion, with $1,426 billion unrestricted, and, as in 1996, it allocated $7.5 million to the ISD Fund for new or expanded contracts under the ISDA. Omnibus Consolidated Appropriations Act, 1997, Pub.L. No. 104-208, 110 Stat. 3009-212, 3009-213 (1996). Thus, neither Act on its face restricted or limited the amount of funds, out of the lump-sum appropriation, available for CSCs for ongoing programs. Both designated $7.5 million to “remain available until expended” in the ISD Fund to pay for CSCs for new or expanded contracts.
In fiscal years 1996 and 1997, the requests for CSCs for new and expanded contracts exceeded the $7.5 million allocated. As a result, full CSC funding for such new and expanded contracts was delayed and/or not paid at all for some tribes, including the plaintiffs. Additionally, plaintiffs allege that CSC funding for their ongoing contracts was inadequate^. The Cherokee Nation claims that, in total, it was not paid $3.4 million in CSC for fiscal year 1997. See First Amended Comp, at ¶¶ 31, 32; Appellants’ App. at 44. The Shoshone-Paiute Tribe claims it was not paid $3.5 million in CSC for fiscal years 1996 and 1997. See id. at ¶¶ 14, 15; Appellants’ App. at 39-40; Fitzpatrick Decl. at 18, Appellants’ App. at 534-35. Both Tribes assert that, because of these budget shortfalls, they were compelled to make substantial cuts in their programs.
On October 21, 1998, Congress passed the Omnibus Consolidated and Emergency Supplemental Appropriations Act, 1999, Pub.L. No. 105-277, § 314, 112 Stat. 2681-288 (1998), which imposed a mandatory cap on the total amount of CSC funding for new and expanded programs. Section 314 states in part:
Notwithstanding any other provision of law, amounts appropriated to or earmarked in committee reports for the Bureau of Indian Affairs and the Indian Health Service by Public Law 103-138, 103-332, 104-134, 104-208 and 105-83 for payments to tribes and tribal organizations for contract support costs associated with self-determination or self-governance contracts, grants, compacts, or annual funding agreements with the Bureau of Indian Affairs or the Indian Health Service as funded by such Acts, are the total amounts available for fiscal years 1994 through 1998 for such purposes ....
The public laws referenced in § 314 included the 1996 and 1997 Appropriations Acts which, as indicated, had appropriated $7.5 million for CSCs for new and expanded programs. Additionally, the committee reports which preceded those laws had earmarked certain amounts for CSCs for ongoing programs. In 1998 Congress also enacted a one-year moratorium barring the Secretary from entering into further ISDA contracts. See id., § 328; see also Citizen Potawatomi Nation v. Norton, 248 F.3d 993, 1001 (10th Cir.), modified on rehearing, 257 F.3d 1158 (2001).
Alleging that the Secretary failed to fully pay all of their CSCs associated with both the ongoing portions of their compacts with the IHS and the initial and expanded portions of their compacts, the plaintiff Tribes brought administrative claims against the Secretary under the Contract Disputes Act, 41 U.S.C. §§ 601-13. When that failed to resolve the dispute, the Tribes filed this action in March 1999, seeking damages and declaratory relief against the United States, the Secretary, and the Director of the IHS. All parties filed motions for summary judg[1060]*1060ment, and, on June 25, 2001, the district court denied the Tribes’ motions, granted the United States’ motion for summary judgment and dismissed the case.
Concluding that the language of the ISDA was clear and unambiguous, the district court reasoned as follows:
This court finds the contracts at issue are conditioned on the IHS having sufficient funding. This court does not agree with the interpretation espoused by plaintiffs that the language in the Self-Determination Contracts which states that contract support costs are “subject to availability of appropriations” limits only the Secretary’s ministerial duty to disburse funds but not her ultimate liability for full contract support costs.... To adopt plaintiffs’ interpretation would render the phrase “availability of appropriations” meaningless.
Cherokee Nation v. United States, 190 F.Supp.2d 1248, 1259 (E.D.Okla.2001). The court further found that:
the money appropriated to IHS for fiscal years 1996 and 1997 was already committed to pay for funding of recurring costs and other mandatory obligations. Thus, there were simply insufficient appropriations to pay the contract support costs requested by plaintiffs. Further, the IHS could not use any of its annual appropriations to pay plaintiffs’ contract supports costs without impairing its ability to discharge its responsibilities with respect to other tribes and individual Indians.
Id. at 1260. The court also held that § 314 limited the funds available for CSCs for new or expanded programs:
Section 314 imposes a $7.5 million cap on IHS’ payments each year to tribes for contract support costs for their new afid expanded programs from 1994 through 1998. This amount had already been disbursed for the years in question. Section 314 bars further payments for those years since no appropriations were available.
Id. at 1262. Finally, the court rejected plaintiffs’ argument that, regardless of the level of appropriations, the government was nonetheless liable to them under contract principles for their full CSCs.
Plaintiff Tribes appeal, arguing: (1) sufficient appropriations were legally available such that the Secretary was able to and should have paid plaintiffs’ full CSCs for fiscal years 1996 and 1997 and neither the availability-of-appropriations clause nor the reduction clause contained in 25 U.S.C. § 450j — 1(b) provide a defense to that obligation; (2) section 314 does not excuse the failure to pay because it would amount to a retroactive extinguishment of vested contractual and statutory rights, thereby, at a minimum, exposing the government to liability in damages; and (3) plaintiffs’ contracts under the ISDA obligated the IHS to secure adequate appropriations to satisfy its contractual obligations.
We review the grant of summary judgment de novo, applying the same standard as did the district court. Ramah Navajo Chapter, 112 F.3d at 1460. Summary judgment is appropriately granted where “there is no genuine issue as to any material fact and ... the moving party is entitled to judgment as a matter of law.” Fed.R.Civ.P. 56(c). “We examine the factual record and reasonable inferences therefrom in the light most favorable to the nonmoving party.” Ramah Navajo Chapter, 112 F.3d at 1460.
DISCUSSION
“The starting point in any case involving statutory construction is the language of the statute itself.” Id. The government [1061]*1061argues that § 450j-l(b) clearly and unambiguously states that the IHS’ obligation to provide full funding for ongoing and/or new and expanded CSC for plaintiffs’ programs in fiscal years 1996 and 1997 is subject to the availability of appropriations by Congress, and, since there were insufficient appropriations to fully pay those costs, IHS incurs no liability for its failure to so pay. It further argues that three circuit courts have so held, and we should align ourselves with those courts.
We begin, therefore, with the relevant language of the ISDA: “Notwithstanding any other provision in this subchapter, the provision of funds under this subchapter is subject to the availability of appropriations and the Secretary is not required to reduce funding for programs, projects, or activities serving a tribe to make funds available to another tribe.... ” 45 U.S.C. § 450j-l(b). As the statute plainly states, the “-provision of funds” is “subject to the availability of appropriations.” Id. (emphasis added). This is so “[njotwithstand-ing any other provision” of the Act. Id. (emphasis added).
This language is “clear and unambiguous.” Babbitt v. Oglala Sioux Tribal Pub. Safety Dep’t, 194 F.3d 1374, 1378 (Fed.Cir.1999). By means of this express language, “Congress has plainly excluded the possibility of construing the contract support costs provision as an entitlement that exists independently of whether Congress appropriates money to cover it.” Shoshone-Bannock Tribes, 279 F.3d at 665. We agree with those courts, as well as the District of Columbia Circuit, which also found the statutory language clear and compelling:
[W]e read the subject-to-availability-of-funds provision to mean precisely what it says: the Secretary need only distribute the amount of money appropriated by Congress under the Act, and need not take money intended to serve non-CSF purposes under the ISDA in order to meet his responsibility to allocate CSF.
Ramah Navajo Sch. Bd., 87 F.3d at 1345. To hold otherwise would “render the subject-to-appropriations language of § 450j-1(b) meaningless.” Oglala Sioux Tribal Pub. Safety Dep’t, 194 F.3d at 1378.
Plaintiffs respond that appropriations were, in fact, “legally available” to fully pay their CSCs. Thus, they argue that the availability clause does not excuse the government’s failure to fully pay their CSCs for their ongoing programs/contracts or their new or expanded ones. Because the arguments are slightly different with respect to CSC funding for ongoing contracts, as contrasted with new or expanded ones, we address each set of contracts in turn.
I. Ongoing Contract CSCs
Plaintiffs make a series of arguments about why, notwithstanding the availability clause, they were entitled to full funding of CSCs for ongoing programs. First, they argue that the appropriations for ongoing CSCs at issue here were legally available because they were part of a lump-sum unrestricted appropriation for IHS, and the fact that the appropriations committee reports recommended that CSCs for ongoing contracts be limited to $153 million in 1976 and $160 million in 1997 is irrelevant in the face of the silence of the Appropriation Acts on the issue. They also argue that CSC payments cannot “take a backseat to IHS’s discretionary decisions about how best to spend its lump-sum appropriations” without violating both the spirit of the ISDA as a whole and the legislative history of the 1988 amendments to the ISDA. Appellants’ Op. Br. at 28. Those amendments include § 450j-l(b), which itself reflected “a studied congressional in[1062]*1062tent to deny the Secretary all discretion over contract funding decisions.” Id. Finally, they argue the district court erred in relying on the recommendations of the appropriations committees as providing an “earmark” capping the amount available for ongoing CSCs.
Based on the materials before it at the summary judgment stage, the district court found that “[m]ost of IHS’ annual appropriations are distributed to area offices for the payment of recurring costs ... [which are costs that] occur automatically from year to year and must be funded without reduction.” Cherokee Nation, 190 F.Supp.2d at 1250 (citing the Declaration of Carl Fitzpatrick, the Director of the Division of Financial Management for the IHS). Thus, “[i]n fiscal year 1997, IHS allocated to the Area Offices approximately $1,368,893,059 of the total approximately $1.8 billion annual appropriation on a recurring basis.... ” Fitzpatrick Decl. at ¶ 10, Appellants’ App. at 530-31. For fiscal year 1996, the IHS allocated approximately $1,313,990,083 on a recurring basis. Id., Appellants’ App. at 531.
Further, in accordance with the appropriation committee report recommendations, the IHS allocated to area offices for tribal contract CSCs $153,040,000 in 1996 and $160,660,000 in 1997. Id. at ¶ 17, Appellants’ App. at 534. Fitzpatrick further declared that “reprogramming additional funds for contract support costs would have required IHS to use money otherwise dedicated to other purposes supporting health services delivery to tribes.” Id. at ¶ 17, Appellant’s App. at 534. Finally, Fitzpatrick stated that all of the money appropriated for fiscal years 1996 and 1997 was in fact spent, leaving a zero balance at the end of the year.5
While plaintiffs argue that the district court’s conclusions on these points are unsupported or somehow erroneous, they do not directly challenge the validity or accuracy of the Fitzpatrick Declaration, nor explain why the district court was not entitled to rely on it in ruling on the motions for summary judgment. The Fitzpatrick Declaration demonstrated that providing to the plaintiff Tribes their entire CSCs for ongoing contracts would have necessitated a reduction in funding for other tribal programs, or a reprogramming of such funds.6
Plaintiffs argue that the government is simply making an “after-the-fact” justification for its failure to fully pay CSCs, once it decided to spend all the money appropriated to it on other items. They argue that their contractual and statutory entitlement to such full funding vested immediately, at the beginning of each fiscal year, and, presumably, ahead of other IHS obli[1063]*1063gations. But, as the government points out, plaintiffs provide no support for that assertion, nor would that make sense, given the structure of the compacts plaintiffs have with the government, as well as the IHS’ numerous other mandatory financial obligations.7
Moreover, while the Tribes correctly argue that the earmark recommendations of a committee are not typically legally binding,8 the IHS is likewise not obligated to completely ignore them. Nothing suggests that the IHS awarded the amount it did for ongoing program CSCs because it felt legally obligated to do so because of the committee report recommendations, as opposed to making that allocation as an exercise of the limited discretion inevitably vested in it. See Ramah Navajo Chap., 112 F.3d at 1463 (noting that 1988 amendments retain for government some discretion in awarding CSCs); Ramah Navajo Sch. Bd., Inc., 87 F.3d at 1346 n. 11 (noting the very limited discretion the Secretary has to award insufficient CSC funds under the ISDA).9 In sum, we agree with the district court that funding for the Tribes’ ongoing CSCs was subject to the availability of appropriations from Congress, and there were insufficient appropriations to fully pay those CSCs.
II. New or Expanded Contracts
As all parties agree, the 1996 and 1997 Appropriations Acts specifically addressed funding for new or expanded tribal contracts: “$7,500,000 shall remain available until expended [for the ISD Fund] ... for the transitional costs of initial or expanded tribal contracts.” 110 Stat. 1321-189, 110 Stat. 3009-212, 213. As all parties also agree, tribes requested far more than the $7.5 million available for new or expanded contracts, and, pursuant to its queue or priority list system, the IHS awarded CSC funds to tribes ahead of plaintiffs on the priority list
Plaintiffs argue that the “shall remain available” language placed no cap or limit on the amount of CSC funds which could be awarded to tribes for new or expanded programs, so IHS’ failure to award more than the $7.5 million violated both the ISDA and plaintiffs’ compacts with the government. We disagree.
The Ninth Circuit in Shoshone-Bannock Tribes considered this very issue. It concluded as follows:
The appropriation language is arguably ambiguous. The language, $7.5 million [1064]*1064“shall remain available until expended” is not an unambiguous cap, as was the “of which hot to exceed” language of the [1995] appropriation. By themselves, the words might mean that $7.5 million is available, without necessarily implying that other money is unavailable. Alternatively, they could mean that, of the total appropriation, only $7.5 million is available for the contract support costs. The House Appropriations Committee provided explanatory language in its report on the appropriation. The Committee Report speaks to a concern it had “to contain the cost escalation in contract support costs,” and says “[t]he Committee has provided $7,500,000 for the Indian Self-Determination Fund ... to be used for new and expanded contracts.” This Committee Report language lends itself to the second reading, that only $7.5 million is available, not the first. The most natural reading is that the Committee gave attention to how much of the total .appropriation should go to contract support costs for new and expanded contracts and decided that $7.5 million was all they wanted to spend.
Shoshone-Bannock Tribes, 279 F.3d at 666 (footnote omitted).
The Ninth Circuit found further support for its conclusion.in § 314, by which, the court opined, “Congress eliminated the ambiguity retroactively.” Id. Thus, the court concluded:
The “availability” language in the fiscal year 1996 appropriation either plainly limits the funds available for contract support to the $7.5 million appropriated for that purpose or, if we were to take the interpretation most favorable to the Tribes, is, at best ambiguous, leaving room for an argument that the remaining $1.7 billion is also “available.” But the ambiguity, if there is any, is cleared away, both by.the Appropriations Committee report explaining the $7,5 million appropriation when it was made and, with no possible ambiguity, by the 1999 “that’s all there is” language in § 314.
Id. at 667.
Plaintiffs respond that the term “shall remain available” has a particular meaning in appropriations law: “the language in the ISD provision is about when a stated sum of money may be spent after the current fiscal year on CSCs for ‘initial or expanded’ contracts, not how much may be spent in the current year for that purpose.” Appellants’ Op. Br. at 35. But the two decisions of the Comptroller General plaintiffs cite in support of that interpretation do not, in our view, support it.10 We agree [1065]*1065with the Ninth Circuit that a better reading of the language is that Congress intended to limit the amount available for new or expanded CSCs to $7.5 million.
III. Section 314
As indicated, in October 1998, Congress passed an Emergency Supplemental Appropriations Act, which included § 314. That section stated in part that “amounts appropriated to or earmarked in committee reports for ... the [IHS] by Public Laws ... 104-134[and] 104-208 ... for payments to tribes and tribal organizations for contract support costs associated with self-determination or self-governance contracts, ... compacts, or annual funding agreements with ... the [IHS] as funded by such Acts, are the total amounts available for fiscal years 1994 through 1998 for such purposes....” Pub.L. No. 105-277, § 314, 112 Stat. 2681-288 (1988). Public Laws 104-134 and 104-208 were, respectively, the Appropriations Acts for fiscal years 1996 and 1997.
The government argues we need not consider § 314 as a retroactive law; rather, it simply clarifies what Congress meant in enacting the 1996 and 1997 Appropriations Acts. The Tribes argue that, if we construe § 314 retroactively, it amounts to a breach of statutory and contractual vested rights.
“[I]t is beyond dispute that, within constitutional limits, Congress has the power to enact laws with retrospective effect.” INS v. St Cyr, 533 U.S. 289, 316, 121 S.Ct. 2271, 150 L.Ed.2d 347 (2001). There must, however, be “a clear indication from Congress that it intended such a result.” Id.; see also Daniels v. United States, 254 F.3d 1180, 1187 (10th Cir.2001) (“Congress ... has the power to ... direct [a] statute’s retroactive application, but it must do so explicitly.”).
Whether we view this as a retroactive law, or as merely a clarification of the prior Appropriations Acts, Congress could not have been clearer as to its intent that the Act have a retroactive effect. It specifically references prior laws enacted in prior years, both by number and by date, and specifically states that “the amounts appropriated to or earmarked in committee reports ... are the total amounts available.” Thus, Congress indisputably indicated no more funds would be available to pay CSCs for those years, and it made it very clear that that is what it intended to appropriate for those years. We therefore agree with the district court that § 314 supports its conclusion that Congress intended to make available for CSCs for new or expanded contracts in fiscal years 1996 and 1997 only $7.5 million. Further, it indicated that the earmarked amounts in the committee reports for ongoing CSCs were intended to be legally binding. And, as we explain infra, because any contract claim was conditioned on, and subject to, available appropriations, we reject plaintiffs’ argument that § 314 breached plaintiffs’ contractual and /or statutory rights.
IV. Contract Claims
Finally, the Tribes argue that, under the doctrine of New York Airways, Inc. v. United States, 177 Ct.Cl. 800, 369 F.2d 743 [1066]*1066(1966), “an ISDA contract binds the United States to pay even where the agency fails to seek sufficient appropriations from Congress.” Appellants’ Op. Br. at 2. In New York Airways, the plaintiff helicopter company sued the government for money allegedly not paid for mail delivery. The company was entitled by statute to receive compensation for its services, but the amounts earmarked in the appropriations act were exhausted before the end of the fiscal year. The Court of Claims held the government was obligated to pay the helicopter service: “the mere failure of Congress to appropriate funds, without further words modifying or repealing, expressly or by clear implication, the substantive law, does not in and of itself defeat a Governmental obligation created by statute.” New York Airways, 369 F.2d at 748 (citing United States v. Vulte, 233 U.S. 509, 49 Ct.Cl. 687, 34 S.Ct. 664, 58 L.Ed. 1071 (1914)). By contrast, however, where a “contract expressly provided that the quantities of work ordered shall be kept ‘within the limits of available funds,’ ” and where the relevant statute “prohibited obligating the Government to pay a larger sum ... than covered by a specific appropriation” then work “performed in excess of the appropriation was held not to create an obligation against the Government enforceable in the courts.” Id.
This case is like the latter situation, in that the government’s contractual and statutory obligation to pay CSCs was expressly subject to the availability of appropriations. The doctrine of New York Airways does not therefore support the Tribes’ assertion that the government is liable under contract principles despite any shortfall in appropriations. See Oglala Sioux, 194 F.3d at 1379 (rejecting the identical argument based on New York Airways, stating “Oglala’s situation differs fundamentally in that the ability of Interi- or to bind the Government contractually was expressly conditioned on the availability of appropriations.”).11
CONCLUSION
We have carefully considered all of the Tribes’ arguments. For the foregoing reasons, we AFFIRM the judgmént of the district court.