United States v. Navajo Nation Case Brief

delivered the opinion of the Court.

This case concerns the Indian Mineral Leasing Act of 1938 (IMLA), 52 Stat. 347, 25 U. S. C. § 396a et seq., and the role it assigns to the Secretary of the Interior (Secretary) with respect to coal leases executed by an Indian Tribe and a private lessee. The controversy centers on 1987 amendments to a 1964 coal lease entered into by the predecessor of Peabody Coal Company (Peabody) and the Navajo Nation (Tribe), a federally recognized Indian Tribe. The Tribe seeks to recover money damages from the United States for an alleged breach of trust in connection with the Secretary’s approval of coal lease amendments negotiated by the Tribe and Peabody. This Court’s decisions in United States v. Mitchell, 445 U. S. 535 (1980) (Mitchell I), and United States v. Mitchell, 463 U. S. 206 (1983) (Mitchell II), control this case. Concluding that the controversy here falls within Mitchell Fs domain, we hold that the Tribe’s claim for compensation from the Federal Government fails, for it does not derive from any liability-imposing provision of the IMLA or its implementing regulations.

I

A

The IMLA, which governs aspects of mineral leasing on Indian tribal lands, states that “unallotted lands within any Indian reservation,” or otherwise under federal jurisdiction, “may, with the approval of the Secretary , be leased for mining purposes, by authority of the tribal council or other authorized spokesmen for such Indians, for terms not to exceed ten years and as long thereafter as minerals are produced in paying quantities.” §396a. In addition “to providing] Indian tribes with a profitable source of revenue,” Cotton Petroleum Corp. v. New Mexico, 490 U. S. \*494163, 179 (1989), the IMLA aimed to foster tribal self-determination by “giv[ing] Indians a greater say in the use and disposition of the resources found on Indian lands,” BHP Minerals Int’l Inc., 139 I. B. L. A. 269, 311 (1997).

Prior to enactment of the IMLA, decisions whether to grant mineral leases on Indian land generally rested with the Government. See, e. g., Act of June 30, 1919, ch. 4, § 26, 41 Stat. 31, as amended, 25 U. S. C. § 399; see also infra, at 509 (describing § 399). Indian consent was not required, and leases were sometimes granted over tribal objections. See H. R. Rep. No. 1872, 75th Cong., 3d Sess., 2 (1938); S. Rep. No. 985, 75th Cong., 1st Sess., 2 (1937); 46 Fed. Cl. 217, 230 (2000). The IMLA, designed to advance tribal independence, empowers Tribes to negotiate mining leases themselves, and, as to coal leasing, assigns primarily an approval role to the Secretary.

Although the IMLA covers mineral leasing generally, in a number of discrete provisions it deals particularly with oil and gas leases. See 25 U. S. C. § 396b (requirements for public auctions of oil and gas leases); §396d (oil and gas leases are “subject to the terms of any reasonable cooperative unit or other plan approved or prescribed by [the] Secretary”); § 396g (“[T]o avoid waste or to promote the conservation of natural resources or the welfare of the Indians,” the Secretary may approve leases of Indian lands “for the subsurface storage of oil and gas.”). The IMLA contains no similarly specific prescriptions for coal leases; it simply remits coal leases, in common with all mineral leases, to the governance of rules and regulations promulgated by the Secretary. § 396d.

During all times relevant here, the IMLA regulations provided that “Indian tribes . . . may, with the approval of the Secretary ... or his authorized representative, lease their land for mining purposes.” 25 CFR §211.2 (1985). In line with the IMLA itself, the regulations treated oil and gas leases in more detail than coal leases. The regulations re\*495garding royalties, for example, specified procedures applicable to oil and gas leases, including criteria for the Secretary to employ in setting royalty rates. §§211.13, 211.16, 211.17. As to coal royalties, in contrast, the regulations required only that the rate be “not less than 10 cents per ton.” § 211.15(c). No other limitation was placed on the Tribe’s negotiating capacity or the Secretary’s approval authority.1

B

The Tribe involved in this case occupies the largest Indian reservation in the United States. Over the past century, large deposits of coal have been discovered on the Tribe’s reservation lands, which are held for it in trust by the United States. Each year, the Tribe receives millions of dollars in royalty payments pursuant to mineral leases with private companies.

Peabody mines coal on the Tribe’s lands pursuant to leases covered by the IMLA. This case principally concerns Lease 8580 (Lease or Lease 8580), which took effect upon approval by the Secretary in 1964. App. 188-220. The Lease established a maximum royalty rate of 37.5 cents per ton of coal, id., at 191, but made that figure “subject to reasonable adjustment by the Secretary of the Interior or his authorized representative” on the 20-year anniversary of the Lease and every ten years thereafter, id., at 194.

As the 20-year anniversary of Lease 8580 approached, its royalty rate of 37.5 cents per ton yielded for the Tribe only “about 2% of gross proceeds.” 263 F. 3d 1325, 1327 (CA Fed. 2001). This return was higher than the ten cents per ton minimum established by the then-applicable IMLA regula\*496tions. See 25 CFR § 211.15(c) (1985). It was substantially lower, however, than the 1214 percent of gross proceeds rate Congress established in 1977 as the minimum permissible royalty for coal mined on federal lands under the Mineral Leasing Act. See Pub. L. 94-377, §6, 90 Stat. 1087, as amended, 30 U. S. C. § 207(a). For some years starting in the 1970’s, to gain a more favorable return, the Tribe endeavored to renegotiate existing mineral leases with private lessees, including Peabody. See App. 138-139, 143-144.

In March 1984, the Chairman of the Navajo Tribal Council wrote to the Secretary asking him to exercise his contractually conferred authority to adjust the royalty rate under Lease 8580. On June 18, 1984, the Director of the Bureau of Indian Affairs for the Navajo Area, acting pursuant to authority delegated by the Secretary, sent Peabody an opinion letter raising the rate to 20 percent of gross proceeds. Id., at 8-9.

Contesting the Area Director’s rate determination, Peabody filed an administrative appeal in July 1984, pursuant to 25 CFR § 2.3(a) (1985). 46 Fed. Cl., at 222.2 The appeal was referred to the Deputy Assistant Secretary for Indian Affairs, John Fritz, then acting as both Commissioner of Indian Affairs and Assistant Secretary of Indian Affairs, 263 F. 3d, at 1328. In March 1985, Fritz permitted Peabody to supplement its brief and requested additional cost, revenue, and investment data. 46 Fed. Cl., at 222. He thereafter appeared ready to reject Peabody’s appeal. Ibid.; App. 89-97 (undated draft letter). By June 1985, both Peabody and the Tribe anticipated that an announcement favorable to the Tribe was imminent. Id., at 98-99.3

\*497On July 5, 1985, a Peabody Vice President wrote to Interior Secretary Donald Hodel, asking him either to postpone decision on Peabody’s appeal so the parties could seek a negotiated settlement, or to rule in Peabody’s favor. Id., at 98-100. A copy of Peabody’s letter was sent to the Tribe, id., at 100, which then submitted its own letter urging the Secretary to reject Peabody’s request and to secure the Department’s prompt release of a decision in the Tribe’s favor, id., at 119-121. Peabody representatives met privately with Secretary Hodel in. July 1985, 46 Fed. Cl., at 222; no representative of the Tribe was present at, or received notice of, that meeting, id., at 219.

On July 17, 1985, Secretary Hodel sent a memorandum to Deputy Assistant Secretary Fritz. App. 117-118. The memorandum “suggested]” that Fritz “inform the involved parties that a decision on th[e] appeal is not imminent and urge them to continue with efforts to resolve this matter in a mutually agreeable fashion.” Id., at 117. “Any royalty adjustment which is imposed on those parties without their concurrence,” the memorandum stated, “will almost certainly be the subject of protracted and costly appeals,” and “could well impair the future of the contractual relationship” \*498between the parties. Ibid.4 Secretary Hodel added, however, that the memorandum was “not intended as a determination of the merits of the arguments of the parties with respect to the issues which are subject to the appeal.” Id., at 118.

The Tribe was not told of the Secretary’s memorandum to Fritz, but learned that “‘someone from Washington’ had urged a return to the bargaining table.” 46 Fed. Cl., at 223; see App. 342-344. Facing “severe economic pressure,” 263 F. 3d, at 1328; App. 355-356, the Tribe resumed negotiations with Peabody in August 1985, 46 Fed. Cl., at 223.

On September 23, 1985, the parties reached a tentative agreement on a package of amendments to Lease 8580. Ibid.5 They agreed to raise the royalty rate to 121/2 percent of monthly gross proceeds, and to make the new rate retroactive to February 1, 1984. App. 287. The 12% percent rate was at the time customary for leases to mine coal on federal lands and on Indian lands.6 The amendments acknowledged \*499the legitimacy of tribal taxation of coal production, but stipulated that the tax rate would be capped at eight percent. Id., at 295, 299.7 In addition, Peabody agreed to pay the \*500Tribe $1.5 million when the amendments became effective, and $7.5 million more when Peabody began mining additional coal, as authorized by the Lease amendments. Id., at 292-293. The agreement “also addressed ancillary matters such as provisions for future royalty adjustments, arbitration procedures, rights of way, the establishment of a tribal scholarship fund, and the payment by Peabody of back royalties, bonuses, and water payments.” 46 Fed. Cl., at 224. “In consideration of the benefits associated with these lease amendments,” the parties agreed to move jointly to vacate the Area Director’s June 1984 decision, which had raised the royalty to 20 percent. App. 286.

In August 1987, the Navajo Tribal Council approved the amendments. 46 Fed. Cl., at 224. The parties signed a final agreement in November 1987, App. 309, and Secretary Hodel approved it on December 14, 1987, id., at 337-339. Shortly thereafter, pursuant to the parties’ stipulation, the Area Director’s decision was vacated. 46 Fed. Cl., at 224.

In. 1993, the Tribe brought suit against the United States in the Court of Federal Claims, alleging, inter alia, that the Secretary’s approval of the amendments to the Lease constituted a breach of trust. The Tribe sought $600 million in damages.8

\*501The Court of Federal Claims granted summary judgment for the United States. 46 Fed. Cl. 217 (2000). In no uncertain terms, that court found that the Government owed general fiduciary duties to the Tribe, which, in its view, the Secretary had flagrantly dishonored by acting in the best interests of Peabody rather than the Tribe. Nevertheless, the court concluded that the Tribe had entirely failed to link that breach of duty to any statutory or regulatory obligation which could “be fairly interpreted as mandating compensation for the government’s fiduciary wrongs.” Id., at 236. Accordingly, the court held that the United States was entitled to judgment as a matter of law.9

The Court of Appeals for the Federal Circuit reversed. 263 F. 3d 1325 (2001). The Government’s liability to the Tribe, it said, turned on whether “the United States controls the Indian resources.” Id., at 1329. Relying on 25 U. S. C. §399 and regulations promulgated thereunder, the Court of Appeals determined that the measure of control the Secretary exercised over the leasing of Indian lands for mineral development sufficed to warrant a money judgment against the United States for breaches of fiduciary duties connected to coal leasing. 263 F. 3d, at 1330-1332. But see infra, at 509. The appeals court agreed with the Federal Claims Court that the Secretary’s actions regarding Peabody’s administrative appeal violated the Government’s fiduciary obligations to the Tribe, in that those actions “suppressed] and concealed] ” the decision of the Deputy Assistant Secretary, and “thereby favor[ed] Peabody interests to the detriment of Navajo interests.” 263 F. 3d, at 1332. Based on these \*502determinations, the Court of Appeals remanded for further proceedings, including a determination of damages. Id., at 1333.

Judge Schall concurred in part and dissented in part. Id., at 1333-1341. It was not enough, he maintained, for the Tribe to show a violation of a general fiduciary relationship stemming from federal involvement in a particular area of Indian affairs. Rather, a Tribe “must show the breach of a specific fiduciary obligation that falls within the contours of the statutes and regulations that create the general fiduciary relationship at issue.” Id., at 1341. In his view, “the only government action in this case that implicated a specific fiduciary responsibility” was the Secretary’s 1987 approval of the Lease amendments. Id., at 1339. The Secretary had been deficient, Judge Schall concluded, in approving the amendments without first conducting an independent economic analysis of the amended agreement. Id., at 1339-1341.

The Court of Appeals denied rehearing. We granted certiorari, 535 U. S. 1111 (2002), and now reverse.

II

A

“It is axiomatic that the Umted States may not be sued without its consent and that the existence of consent is a prerequisite for jurisdiction.” Mitchell II, 463 U. S., at 212. The Tribe asserts federal subject-matter jurisdiction under 28 U. S. C. § 1505, known as the Indian Tucker Act. That Act provides:

“The United States Court of Federal Claims shall have jurisdiction of any claim against the United States accruing after August 13, 1946, in favor of any tribe . . . whenever such claim is one arising under the Constitution, laws or treaties of the United States, or Executive orders of the President, or is one which otherwise would \*503be cognizable in the Court of Federal Claims if the claimant were not an Indian tribe, band, or group.”10

“If a claim falls within the terms of the [Indian] Tucker Act, the United States has presumptively consented to suit.” Mitchell II, 463 U. S., at 216.

Although the Indian Tucker Act confers jurisdiction upon the Court of Federal Claims, it is not itself a source of substantive rights. Ibid.; see Mitchell I, 445 U. S., at 538. To state a litigable claim, a tribal plaintiff must invoke a rights-creating source of substantive law that “can fairly be interpreted as mandating compensation by the Federal Government for the damages sustained.” Mitchell II, 463 U. S., at 218. Because “[t]he [Indian] Tucker Act itself provides the necessary consent” to suit, ibid., however, the rights-creating statute or regulation need not contain “a second waiver of sovereign immunity,” id., at 218-219.

B

Mitchell I and Mitchell II are the pathmarking precedents on the question whether a statute or regulation (or combination thereof) “can fairly be interpreted as mandating compensation by the Federal Government.” Mitchell II, 463 U. S., at 218.

In Mitchell I, we considered whether the Indian General Allotment Act of 1887 (GAA), 24 Stat. 388, as amended, 25 U.S.C. §331 et seq. (1976 ed.) (§§331-333 repealed 2000), authorized an award of money damages against the United \*504States for alleged mismanagement of forests located on lands allotted to tribal members. The GAA authorized the President of the United States to allot agricultural or grazing land to individual tribal members residing on a reservation, § 331, and provided that “the United States does and will hold the land thus allotted ... in trust for the sole use and benefit of the Indian to whom such allotment shall have been made,” §348.

We held that the GAA did not create private rights enforceable in a suit for money damages under the Indian Tucker Act. After examining the GAA’s language, history, and purpose, we concluded that it “created only a limited trust relationship between the United States and the allottee that does not impose any duty upon the Government to manage timber resources.” Mitchell I, 445 U. S., at 542. In particular, we stressed that §§ 1 and 2 of the GAA removed a standard element of a trust relationship by making “the Indian allottee, and not a representative of the United States,.. . responsible for using the land for agricultural or grazing purposes.” Id., at 542-543; see id., at 543 (“Under this scheme,... the allottee, and not the United States, was to manage the land.”). We also determined that Congress decided to have “the United States ‘hold the land... in trust’ not because it wished the Government to control use of the land ..., but simply because it wished to prevent alienation of the land and to ensure that allottees would be immune from state taxation.” Id., at 544. Because “the Act [did] not . . . authoriz[e], much less requir[e], the Government to manage timber resources for the benefit of Indian allottees,” id., at 545, we held that the GAA established no right to recover money damages for mismanagement of such resources. We left open, however, the possibility that other sources of law might support the plaintiffs’ claims for damages. Id., at 546, and n. 7.

In Mitchell II, we held that a network of other statutes and regulations did impose judicially enforceable fiduciary \*505duties upon the United States in its management of forested allotted lands. “In contrast to the bare trust created by the [GAA],” we observed, “the statutes and regulations now before us clearly give the Federal Government full responsibility to manage Indian resources and land for the benefit of the Indians.” 463 U. S., at 224.

As to managing the forests and selling timber, we noted, Congress instructed the Secretary to be mindful of “the needs and best interests of the Indian owner and his heirs,” 25 U. S. C. § 406(a), and specifically to take into account:

“(1) the state of growth of the timber and the need for maintaining the productive capacity of the land for the benefit of the owner and his heirs, (2) the highest and best use of the land, including the advisability and practicality of devoting it to other uses for the benefit of the owner and his heirs, and (3) the present and future financial needs of the owner and his heirs.” Ibid.

Proceeds from timber sales were to be paid to landowners “or disposed of for their benefit.” Ibid. Congress’ prescriptions, Interior Department regulations, and “daily supervision over the harvesting and management of tribal timber” by the Department’s Bureau of Indian Affairs, we emphasized, combined to place under federal control “[virtually every stage of the process.” Mitchell II, 463 U. S., at 222 (internal quotation marks omitted); see id., at 222-224 (describing comprehensive timber management statutes and regulations promulgated thereunder).

Having determined that the statutes and regulations “established] fiduciary obligations of the Government in the management and operation of Indian lands and resources,” we concluded that the relevant legislative and executive prescriptions could “fairly be interpreted as mandating compensation by the Federal Government for damages sustained.” Id., at 226. A damages remedy, we explained, would “fur-the[r] the purposes of the statutes and regulations, which \*506clearly require that the Secretary manage Indian resources so as to generate proceeds for the Indians.” Id., at 226-227.

To state a claim cognizable under the Indian Tucker Act, Mitchell I and Mitchell II thus instruct, a Tribe must identify a substantive source of law that establishes specific fiduciary or other duties, and allege that the Government has failed faithfully to perform those duties. See 463 U. S., at 216-217, 219. If that threshold is passed, the court must then determine whether the relevant source of substantive law “can fairly be interpreted as mandating compensation for damages sustained as a result of a breach of the duties [the governing law] impose[s].” Id., at 219. Although “the undisputed existence of a general trust relationship between the United States and the Indian people” can “reinforc[e]” the conclusion that the relevant statute or regulation imposes fiduciary duties, id., at 225, that relationship alone is insufficient to support jurisdiction under the Indian Tucker Act. Instead, the analysis must train on specific rights-creating or duty-imposing statutory or regulatory prescriptions. Those prescriptions need not, however, expressly provide for money damages; the availability of such damages may be inferred. See id., at 217, n. 16 (“[T]he substantive source of law may grant the claimant a right to recover damages either expressly or by implication.” (internal quotation marks and citation omitted)).

C

We now consider whether the IMLA and its implementing regulations can fairly be interpreted as mandating compensation for the Government’s alleged breach of trust in this case. We conclude that they cannot.

1

The Tribe’s principal contention is that the IMLA’s statutory and regulatory scheme, viewed in its entirety, attaches \*507fiduciary duties to each Government function under that scheme, and that the Secretary acted in contravention of those duties by approving the 12V2 percent royalty contained in the amended Lease. See, e. g., Brief for Respondent 20, 30-38. We read the IMLA differently. As we see it, the statute and regulations at issue do not provide the requisite “substantive law” that “mandates] compensation by the Federal Government.” Mitchell II, 463 U. S., at 218.

The IMLA and its implementing regulations impose no obligations resembling the detailed fiduciary responsibilities that Mitchell II found adequate to support a claim for money damages.11 The IMLA simply requires Secretarial approval before coal mining leases negotiated between Tribes and third parties become effective, 25 U. S. C. § 396a, and authorizes the Secretary generally to promulgate regulations governing mining operations, § 396d. Yet the dissent concludes that the IMLA imposes “one or more specific statutory obligations, as in Mitchell II, at the level of fiduciary duty whose breach is compensable in damages.” Post, at 521. The endeavor to align this case with Mitchell II rather than Mitchell I, however valiant, falls short of the mark. Unlike the “elaborate” provisions before the Court in Mitchell II, 463 U. S., at 225, the IMLA and its regulations do not “give the Federal Government full responsibility to manage Indian resources ... for the benefit of the Indians,” id., at 224. The Secretary is neither assigned a comprehensive managerial role nor, at the time relevant here, expressly invested with responsibility to secure “the needs and best interests of the \*508Indian owner and his heirs.” Ibid, (internal quotation marks omitted) (quoting 25 U. S. C. § 406(a)).12

Instead, the Secretary’s involvement in coal leasing under the IMLA more closely resembles the role provided for the Government by the GAA regarding allotted forest lands. See Mitchell I, 445 U. S., at 540-544. Although the GAA required the Government to hold allotted land “in trust for the sole use and benefit of the Indian to whom such allotment shall have been made,” id., at 541 (quoting 25 U. S. C. § 348), that Act did not “authoriz[e], much less requir[e], the Government to manage timber resources for the benefit of Indian allottees,” Mitchell I, 445 U. S., at 545. Similarly here, the IMLA and its regulations do not assign to the Secretary managerial control over coal leasing. Nor do they even establish the “limited trust relationship,” id., at 542, existing under the GAA; no provision of the IMLA or its regulations contains any trust language with respect to coal leasing.

Moreover, as in Mitchell I, imposing fiduciary duties on the Government here would be out of line with one of the statute's principal purposes. The GAA was designed so that “the allottee, and not the United States, . . . [would] manage the land.” Id., at 543. Imposing upon the Government a fiduciary duty to oversee the management of allotted lands would not have served that purpose. So too here. The IMLA aims to enhance tribal self-determination by giving Tribes, not the Government, the lead role in negotiating mining leases with third parties. See supra, at 494. As the Court of Federal Claims recognized, “[t]he ideal of Indian self-determination is directly at odds with Secretarial control over leasing.” 46 Fed. Cl., at 230.

\*5092

The Tribe nevertheless argues that the actions of the Secretary targeted in this case violated discrete statutory and regulatory provisions whose breach is redressable in an action for damages. In this regard, the Tribe relies extensively on 25 U. S. C. § 399, see, e. g., Brief for Respondent 22-23,30-31, upon which the Court of Appeals placed considerable weight as well, see 263 F. 3d, at 1330-1331; supra, at 501. That provision, however, is not part of the IMLA and does not govern Lease 8580. Enacted almost 20 years before the IMLA, § 399 authorizes the Secretary to lease certain unallotted Indian lands for mining purposes on terms she sets, and does not provide for input from the Tribes concerned. See supra, at 494. In exercising that authority, the Secretary is authorized to “perform any and all acts .. . as may be necessary and proper for the protection of the interests of the Indians and for the purpose of carrying the provisions of this section into full force and effect.” §399. But that provision describes the Secretary’s leasing authority under § 399; it does not bear on the Secretary’s more limited approval role under the IMLA.

Similarly unavailing is the Tribe’s reliance on the Indian Mineral Development Act of 1982 (IMDA), 25 U. S. C. §2101 et seq. See Brief for Respondent 23-24, 30. The IMDA governs the Secretary’s approval of agreements for the development of certain Indian mineral resources through exploration and like activities. It does not establish standards governing the Secretary’s approval of mining leases negotiated by a Tribe and a third party. The Lease in this case, in short, falls outside the IMDA’s domain. See Reply Brief 12-13.

Citing 25 U. S. C. §396a, the IMLA’s general prescription, see supra, at 493, the Tribe next asserts that the Secretary violated his “duty to review and approve any proposed coal lease with care to promote IMLA’s basic purpose and the [Tribe’s] best interests.” Brief for Respondent 39. To sup\*510port that assertion, the Tribe points to various Government reports identifying 20 percent as the appropriate royalty, see id,., at 5-7, 15, and to the Secretary’s decision, made after receiving ex parte communications from Peabody, to withhold departmental action, see id., at 9-10, 15.

In the circumstances presented, the Tribe maintains, the Secretary’s eventual approval of the 12Vz percent royalty violated his duties under § 396a in two ways. First, the Secretary’s approval was “improvident,” Tr. of Oral Arg. 48, because it allowed the Tribe’s coal “to be conveyed for what [the Secretary] knew to be about half of its value,” id., at 49. Second, Secretary Model’s intervention into the Lease adjustment process “skewed the bargaining” by depriving the Tribe of the 20 percent rate, rendering the Secretary’s subsequent approval of the 121A percent rate “unfair.” Id., at 50.

The Tribe’s vigorously pressed arguments headlining § 396a fare no better than its arguments tied to § 399 and the IMDA; the § 396a arguments fail, for they assume substantive prescriptions not found in that provision.13 As to the “improvidence] ” of the Secretary’s approval, the Tribe can point to no guides or standards circumscribing the Secretary’s affirmation of coal mining leases negotiated between a Tribe and a private lessee. Regulations under the IMLA in effect in 1987 established a minimum royalty of ten cents per ton. See 25 CFR §211.15(e) (1985). But the royalty contained in Lease 8580 well exceeded that regulatory floor. \*511See supra, at 495-496.14 At the time the Secretary approved the amended Lease, it bears repetition, 121A percent was the rate the United States itself customarily received from leases to mine coal on federal lands. Similarly, the customary rate for coal leases on Indian lands issued or readjusted after 1976 did not exceed 12½ percent. See supra, at 498-499, n. 6.15

In sum, neither the IMLA nor any of its regulations establishes anything more than a bare minimum royalty. Hence, there is no textual basis for concluding that the Secretary's approval function includes a duty, enforceable in an action for money damages, to ensure a higher rate of return for the Tribe concerned. Similarly, no pertinent statutory or regulatory provision requires the Secretary, on pain of damages, to conduct an independent “economic analysis” of the reasonableness of the royalty to which a Tribe and third party have agreed. 263 F. 3d, at 1340 (concurring opinion below, finding such a duty).16

\*512The Tribe’s second argument under § 896a concentrates on the “skewing]” effect of Secretary Hodel’s 1985 intervention, i. e., his direction to Deputy Assistant Secretary Fritz to withhold action on Peabody’s appeal from the Area Director’s decision setting a royalty rate of 20 percent. Tr. of Oral Arg. 50; see supra, at 497-498. The Secretary’s actions, both in intervening in the administrative appeal process, and in approving the amended Lease, the Tribe urges, were not based upon an assessment of the merits of the royalty issue; instead, the Tribe maintains, they were attributable entirely to the undue influence Peabody exerted through ex parte communications with the Secretary. See Brief for Respondent 40-42. Underscoring that the Tribe had no knowledge of those communications or of Secretary Hodel’s direction to Fritz, see supra, at 498, the Tribe asserts that its bargaining position was seriously compromised when it resumed negotiations with Peabody in 1985. See, e. g., Tr. of \*513Oral Arg. 50-52. The Secretary’s ultimate approval of the 12V2 percent royalty, the Tribe concludes, was thus an outcome fundamentally unfair to the Tribe.

Here again, as the Court of Federal Claims ultimately determined, see supra, at 501, the Tribe’s assertions are not grounded in a specific statutory or regulatory provision that can fairly be interpreted as mandating money damages. Nothing in §396a, the IMLA’s basic provision, or in the IMLA’s implementing regulations proscribed the ex parte communications in this case, which occurred during an administrative appeal process largely unconstrained by formal requirements. See 25 CFR § 2.20 (1985) (Commissioner may rely on “any information available to [him] . . . whether formally part of the record or not.”); supra, at 496-497, n. 3. Either party could have effected a transfer of Peabody’s appeal to the Board. See 25 CFR § 2.19(b) (1985); supra, at 496-497, n. 3. Exercise of that option would have triggered review of a more formal character, in which ex parte communications would have been prohibited. See 43 CFR § 4.27(b) (1985). But the Tribe did not elect to transfer the matter to the Board, and the regulatory proscription on ex parte contacts applicable in Board proceedings thus did not govern.

We note, moreover, that even if Deputy Assistant Secretary Fritz had rendered an opinion affirming the 20 percent royalty approved by the Area Director, it would have been open to the Secretary to set aside or modify his subordinate’s decision. See supra, at 498, n. 4. As head of the Department of the Interior, the Secretary had “authority to review any decision of any employee or employees of the Department.” 43 CFR § 4.5(a)(2) (1985); cf. Michigan Citizens for Independent Press v. Thornburgh, 868 F. 2d 1285 (CADC) (upholding Attorney General’s approval, over the contrary conclusions of an administrative law judge and the Justice Department’s Antitrust Division, of a joint operating agreement under the Newspaper Preservation Act), aff’d by an equally divided Court, 493 U. S. 38 (1989) (per curiam). Ac\*514cordingly, rejection of Peabody’s appeal by the Deputy Assistant Secretary would not necessarily have yielded a higher royalty for the Tribe.

* * *

However one might appraise the Secretary’s intervention in this case, we have no warrant from any relevant statute or regulation to conclude that his conduct implicated a duty enforceable in an action for damages under the Indian Tucker Act. The judgment of the United States Court of Appeals for the Federal Circuit is accordingly reversed, and the case is remanded for further proceedings consistent with this opinion.

It is so ordered.