We are called upon to decide in this case whether a State may restrict an Indian Tribe's regulation of hunting and fishing on its reservation. With extensive federal assistance and supervision, the Mescalero Apache Tribe has established a comprehensive scheme for managing the reservation's fish and wildlife resources. Federally approved Tribal ordinances regulate in detail the conditions under which both members of the Tribe and nonmembers may hunt and fish. New Mexico seeks to apply its own laws to hunting and fishing by nonmembers on the reservation. We hold that this application of New Mexico's hunting and fishing laws is preempted by the operation of federal law.

* The Mescalero Apache Tribe (Tribe) resides on a reservation located within Otero County in south central New Mexico. The reservation, which represents only a small portion of the aboriginal Mescalero domain, was created by a succession of Executive Orders promulgated in the 1870's and 1880's.1 The present reservation comprises more than 460,000 acres, of which the Tribe owns all but 193.85 acres.2 Approximately 2,000 members of the Tribe reside on the reservation, along with 179 non-Indians, including resident federal employees of the Bureau of Indian Affairs and the Indian Health Service.

The Tribe is organized under the Indian Reorganization Act of 1934, ch. 576, 48 Stat. 984, 25 U.S.C. § 461 et seq., which authorizes any tribe residing on a reservation to adopt a constitution and bylaws, subject to the approval of the Secretary of the Interior (Secretary). The Tribe's Constitution, which was approved by the Secretary on January 12, 1965, requires the Tribal Council

"[t]o protect and preserve the property, wildlife and natural resources of the tribe, and to regulate the conduct of trade and the use and disposition of tribal property upon the reservation, providing that any ordinance directly affecting non-members of the tribe shall be subject to review by the Secretary of Interior." App. 53.

The Constitution further provides that the Council shall

"adopt and approve plans of operation to govern the conduct of any business or industry that will further the economic well-being of the members of the tribe, and to undertake any activity not inconsistent with Federal law or with this constitution, designed for the social or economic improvement of the Mescalero Apache people, . . . subject to review by the Secretary of the Interior." Ibid.

Anticipating a decline in the sale of lumber which h § been the largest income-producing activity within the reservation, the Tribe has recently committed substantial time and resources to the development of other sources of income. The Tribe has constructed a resort complex financed principally by federal funds,3 and has undertaken a substantial development of the reservation's hunting and fishing resources. These efforts provide employment opportunities for members of the Tribe, and the sale of hunting and fishing licenses and related services generates income which is used to maintain the Tribal government and provide services to Tribe members.4

Development of the reservation's fish and wildlife resources has involved a sustained, cooperative effort by the Tribe and the Federal Government. Indeed, the reservation's fishing resources are wholly attributable to these recent efforts. Using federal funds, the Tribe has established eight artificial lakes which, together with the reservation's streams, are stocked by the Bureau of Sport Fisheries and Wildlife of the U.S. Fish and Wildlife Service, Department of the Interior, which operates a federal hatchery located on the reservation. None of the waters are stocked by the State.5 The United States has also contributed substantially to the creation of the reservation's game resources. Prior to 1966 there were only 13 elk in the vicinity of the reservation. In 1966 and 1967 the National Park Service donated a herd of 162 elk which was released on the reservation. Through its management and range development6 the Tribe has dramatically increased the elk population, which by 1977 numbered approximately 1,200. New Mexico has not contributed significantly to the development of the elk herd or the other game on the reservation, which includes antelope, bear and deer.7

The Tribe and the Federal Government jointly conduct a comprehensive fish and game management program. Pursuant to its Constitution and to an agreement with the Bureau of Sport Fisheries and Wildlife,8 the Tribal Council adopts hunting and fishing ordinances each year. The tribal ordinances, which establish bag limits and seasons and provide for licensing of hunting and fishing, are subject to approval by the Secretary under the Tribal Constitution and have been so approved. The Tribal Council adopts the game ordinances on the basis of recommendations submitted by a Bureau of Indian Affairs range conservationist who is assisted by full- ime conservation officers employed by the Tribe. The recommendations are made in light of the conservation needs of the reservation, which are determined on the basis of annual game counts and surveys. Through the Bureau of Fish and Wildlife, the Secretary also determines the stocking of the reservation's waters based upon periodic surveys of the reservation.

Numerous conflicts exist between State and tribal hunting regulations.9 For instance, tribal seasons and bag limits for both hunting and fishing often do not coincide with those imposed by the State. The Tribe permits a hunter to kill both a buck and a doe; the State permits only buck to be killed. Unlike the State, the Tribe permits a person to purchase an elk license in two consecutive years. Moreover, since 1977, the Tribe's ordinances have specified that State hunting and fishing licenses are not required for Indians or non-Indians who hunt or fish on the reservation.10 The New Mexico Department of Game and Fish has enforced the State's regulations by arresting non-Indian hunters for illegal possession of game killed on the reservation in accordance with tribal ordinances but not in accordance with State hunting regulations.

In 1977 the Tribe filed suit against the State and the Director of its Fish and Game Department in the United States District Court for the District of New Mexico, seeking to prevent the State from regulating on-reservation hunting or fishing by members or nonmembers. On August 2, 1978, the District Court ruled in favor of the Tribe and granted declaratory and injunctive relief against the enforcement of the State's hunting and fishing laws against any person for hunting and fishing activities conducted on the reservation. The United States Court of Appeals for the Tenth Circuit affirmed. 630 F.2d 724 (10 Cir.1980). Following New Mexico's petition for a writ of certiorari, this Court vacated the Tenth Circuit's judgment, 450 U.S. 1036, 101 S.Ct. 1752, 68 L.Ed.2d 234 (1981), and remanded the case for reconsideration in light of Montana v. United States, 450 U.S. 544, 101 S.Ct. 1245, 67 L.Ed.2d 493 (1981). On remand, the Court of Appeals adhered to its earlier decision. 677 F.2d 55 (10 Cir.1982). We granted certiorari, --- U.S. ----, 103 S.Ct. 371, 74 L.Ed.2d 506 (1982), and we now affirm.

New Mexico concedes that on the reservation the Tribe exercises exclusive jurisdiction over hunting and fishing by members of the Tribe and may also regulate the hunting and fishing by nonmembers.11 New Mexico contends, however, that it may exercise concurrent jurisdiction over nonmembers and that therefore its regulations governing hunting and fishing throughout the State should also apply to hunting and fishing by nonmembers on the reservation. Although New Mexico does not claim that it can require the Tribe to permit nonmembers to hunt and fish on the reservation, it claims that, once the Tribe chooses to permit hunting and fishing by nonmembers, such hunting and fishing is subject to any State-imposed conditions. Under this view the State would be free to impose conditions more restrictive than the Tribe's own regulations, including an outright prohibition. The question in this case is whether the State may so restrict the Tribe's exercise of its authority.

Our decision in Montana v. United States, supra, does not resolve this question. Unlike this case, Montana concerned lands located within the reservation but not owned by the Tribe or its members. We held that the Crow Tribe could not as a general matter regulate hunting and fishing on those lands. 450 U.S., at 557-567, 101 S.Ct., at 1254-1259.12 But as to "lands belonging to the Tribe or held by the United States in trust for the Tribe," we "readily agree[d]" that a Tribe may "prohibit nonmembers from hunting or fishing . . . [or] condition their entry by charging a fee or establish bag and creel limits." Id., at 557, 101 S.Ct., at 1254. We had no occasion to decide whether a Tribe may only exercise this authority in a manner permitted by a State.

On numerous occasions this Court has considered the question whether a State may assert authority over a reservation. The decision in Worcester v. Georgia, 6 Pet. 515, 561, 8 L.Ed. 483 (1832), reflected the view that Indian tribes were wholly distinct nations within whose boundaries "the laws of [a State] can have no force." We long ago departed from the "conceptual clarity of Mr. Chief Justice Marshall's view in Worcester," Mescalero Apache Tribe v. Jones, 411 U.S. 145, 148, 93 S.Ct. 1267, 1270, 36 L.Ed.2d 114 (1973), and have acknowledged certain limitations on tribal sovereignty. For instance, we have held that Indian tribes have been implicitly divested of their sovereignty in certain respects by virtue of their dependent status,13 that under certain circumstances a State may validly assert authority over the activities of nonmembers on a reservation,14 and that in exceptional circumstances a State may assert jurisdiction over the on-reservation activities of tribal members.15

Nevertheless, in demarcating the respective spheres of State and tribal authority over Indian reservations, we have continued to stress that "Indian tribes are unique aggregations possessing attributes of sovereignty over both their members and their territory," White Mountain Apache Tribe v. Bracker, 448 U.S. 136, 142, 100 S.Ct. 2578, 2582, 65 L.Ed.2d 665 (1980), quoting United States v. Mazurie, 419 U.S. 544, 557, 95 S.Ct. 710, 717, 42 L.Ed.2d 706 (1975). Because of their sovereign status, tribes and their reservation lands are insulated in some respects by an "historic immunity from state and local control," Mescalero Apache Tribe v. Jones, 411 U.S. 145, 152, 93 S.Ct. 1267, 1272, 36 L.Ed.2d 114 (1973), and tribes retain any aspect of their historical sovereignty not "inconsistent with the overriding interests of the National Government." Washington v. Confederated Tribes, supra, 447 U.S. at 153, 100 S.Ct. at 2588.

The sovereignty retained by tribes includes "the power of regulating their internal and social relations," United States v. Kagama, 118 U.S. 375, 381-382, 6 S.Ct. 1109, 1112-1113, 30 L.Ed. 228 (1886), cited in United States v. Wheeler, 435 U.S. 313, 322, 98 S.Ct. 1079, 1085, 55 L.Ed.2d 303 (1978). A tribe's power to prescribe the conduct of tribal members has never been doubted, and our cases establish that "absent governing Acts of Congress," a State may not act in a manner that "infringed on the right of reservation Indians to make their own laws and be ruled by them." McClanahan v. Arizona State Tax Comm'n, 411 U.S. 164, 171-172, 93 S.Ct. 1257, 1261-1262, 36 L.Ed.2d 129 (1973), quoting Williams v. Lee, 358 U.S. 217, 219-220, 79 S.Ct. 269, 270, 3 L.Ed.2d 251 (1959). See also Fisher v. District Court, 424 U.S. 382, 388-389, 96 S.Ct. 943, 947, 47 L.Ed.2d 106 (1976) (per curiam ).

A tribe's power to exclude nonmembers entirely or to condition their presence on the reservation is equally well established. See, e.g., Montana v. United States, supra; Merrion v. Jicarilla Apache Tribe, 455 U.S. 130, 102 S.Ct. 894, 71 L.Ed.2d 21 (1982). Whether a State may also assert its authority over the on-reservation activities of nonmembers raises "[m]ore difficult questions," Bracker, supra, 448 U.S., at 144, 100 S.Ct., at 2584. While under some circumstances a State may exercise concurrent jurisdiction over non-Indians acting on tribal reservations, see, e.g., Washington v. Confederated Tribes, supra; Moe v. Salish & Kootenai Tribes, 425 U.S. 463, 96 S.Ct. 1634, 48 L.Ed.2d 96 (1976), such authority may be asserted only if not preempted by the operation of federal law. See, e.g., Ramah Navajo School Bd., --- U.S. ----, 102 S.Ct. 3394, 73 L.Ed.2d 1174; White Mountain Apache Tribe v. Bracker, supra; Central Machinery Co. v. Arizona Tax Comm'n, 448 U.S. 160, 100 S.Ct. 2592, 65 L.Ed.2d 684 (1980); Williams v. Lee, 358 U.S. 217, 79 S.Ct. 269, 3 L.Ed.2d 251 (1959); Warren Trading Post Co. v. Arizona Tax Comm'n, 380 U.S. 685, 85 S.Ct. 1242, 14 L.Ed.2d 165 (1965); Fisher v. District Court, supra; Kennerly v. District Court of Montana, 400 U.S. 423, 91 S.Ct. 480, 27 L.Ed.2d 507 (1971).

In Bracker we reviewed our prior decisions concerning tribal and State authority over Indian reservations and extracted certain principles governing the determination whether federal law preempts the assertion of State authority over nonmembers on a reservation. We stated that that determination does not depend "on mechanical or absolute conceptions of state or tribal sovereignty, but calls for a particularized inquiry into the nature of the state, federal, and tribal interests at stake." 448 U.S., at 145, 100 S.Ct., at 2584.

We also emphasized the special sense in which the doctrine of preemption is applied in this context. See id., at 143-144, 100 S.Ct., at 2583-2584; Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3398. Although a State will certainly be without jurisdiction if its authority is preempted under familiar principles of preemption, we cautioned tha our prior cases did not limit preemption of State laws affecting Indian tribes to only those circumstances. "The unique historical origins of tribal sovereignty" and the federal commitment to tribal self-sufficiency and self-determination make it "treacherous to import . . . notions of preemption that are properly applied to other contexts." Bracker, supra, 448 U.S., at 143, 100 S.Ct., at 2583. See also Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3399. By resting preemption analysis principally on a consideration of the nature of the competing interests at stake, our cases have rejected a narrow focus on congressional intent to preempt State law as the sole touchstone. They have also rejected the proposition that preemption requires "an express congressional statement to that effect." Bracker, supra, 448 U.S., at 144, 100 S.Ct., at 2584 (footnote omitted). State jurisdiction is preempted by the operation of federal law if it interferes or is incompatible with federal and tribal interests reflected in federal law, unless the State interests at stake are sufficient to justify the assertion of State authority. Bracker, supra, 448 U.S., at 145, 100 S.Ct., at 2584. See also Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3403, quoting Hines v. Davidowitz, 312 U.S. 52, 67, 61 S.Ct. 399, 404, 85 L.Ed. 581 (1941).16

Certain broad considerations guide our assessment of the federal and tribal interests. The traditional notions of Indian sovereignty provide a crucial "backdrop," Bracker, supra, 448 U.S., at 143, 100 S.Ct., at 2583, citing McClanahan, supra, 411 U.S., at 172, 93 S.Ct., at 1262, against which any assertion of State authority must be assessed. Moreover, both the tribes and the Federal Government are firmly committed to the goal of promoting tribal self-government, a goal embodied in numerous federal statutes.17 We have stressed that Congress' objective of furthering tribal self-government encompasses far more than encouraging tribal management of disputes between members, but includes Congress' overriding goal of encouraging "tribal self-sufficiency and economic development." Bracker, supra, 448 U.S., at 143, 100 S.Ct., at 2583 (footnote omitted). In part as a necessary implication of this broad federal commitment, we have held that tribes have the power to manage the use of its territory and resources by both members and nonmembers,18 Merrion, supra, 455 U.S., at 137, 102 S.Ct., at 901; Bracker, supra, 448 U.S., at 151, 100 S.Ct., at 2587; Montana v. United States, supra; 18 U.S.C. § 1162(b); 25 U.S.C. §§ 1321(b), 1322(b); 18 U.S.C. § 1165, to undertake and regulate economic activity within the reservation, Merrion, supra, 455 U.S., at 137, 102 S.Ct., at 901, and to defray the cost of governmental services by levying taxes. Ibid. Thus, when a tribe undertakes an enterprise under the authority of federal law, an assertion of State authority must be viewed against any interference with the successful accomplishment of the federal purpose. See generally Bracker, supra, 448 U.S., at 143, 100 S.Ct., at 2583 (footnote omitted), Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3402, quoting Hines v. Davidowitz, 312 U.S. 52, 67, 61 S.Ct. 399, 404, 85 L.Ed. 581 (1941) (State authority precluded when it "stands as an obstacle to the accomplishment of the full purposes and objectives of Congress").

Our prior decisions also guides our assessment of the state interest asserted to justify State jurisdiction over a reservation. The exercise of State authority which imposes additional burdens on a tribal enterprise must ordinarily be justified by functions or services performed by the State in connection with the on-reservation activity. Ramah Navajo School Bd., supra, --- U.S., at ---- and note 7, 102 S.Ct., at 3402 and note 7; Bracker, supra, 448 U.S., at 148-149, 100 S.Ct., at 2586; Central Machinery Co. v. Arizona Tax Comm'n, 448 U.S. 160, 174, 100 S.Ct. 2592, 2601, 65 L.Ed.2d 684 (1980) (POWELL, J., concurring). Thus a State seeking to impose a tax on a transaction between a Tribe and nonmembers must point to more than its general interest in raising revenues. See, e.g., Warren Trading Post Co. v. Arizona, 380 U.S. 685, 85 S.Ct. 1242, 14 L.Ed.2d 165 (1965); Bracker, supra; Ramah Navajo School Bd., supra. See also Confederated Tribes, 447 U.S., at 157, 100 S.Ct., at 2083 ("governmental interest in raising revenues . . . is strongest when the tax is directed at off-reservation value and when the taxpayer is the recipient of state services"); Moe, 425 U.S., at 481-483, 96 S.Ct., at 1645-1646 (State may require tribal shops to collect state cigarette tax from non-member purchasers). A State's regulatory interest will be particularly substantial if the State can point to off-reservation effects that necessitate State intervention. Cf. Puyallup Tribe v. Washington Game Dept., supra.

With these principles in mind, we turn to New Mexico's claim that it may superimpose its own hunting and fishing regulations on the Mescalero Apache Tribe's regulatory scheme.

It is beyond doubt that the Mescalero Apache Tribe lawfully exercises substantial control over the lands and resources of its reservation, in luding its wildlife. As noted above, supra, at 330, and as conceded by New Mexico,19 the sovereignty retained by the Tribe under the Treaty of 1852 includes its right to regulate the use of its resources by members as well as non-members. In Montana v. United States, supra, we specifically recognized that tribes in general retain this authority.

Moreover, this aspect of tribal sovereignty has been expressly confirmed by numerous federal statutes.20 Pub.L. 280 specifically confirms the power of tribes to regulate on-reservation hunting and fishing. 67 Stat. 588, 25 U.S.C. § 1321(b); 18 U.S.C. § 1162(b).21 This authority is afforded the protection of the federal criminal law by 18 U.S.C. § 1165, which makes it a violation of federal law to enter Indian land to hunt, trap or fish without the consent of the tribe. See Montana v. United States, 450 U.S., at 562 n. 11, 101 S.Ct., at 1256 n. 11. The 1981 amendments to the Lacey Act, 16 U.S.C. § 3371 et seq., further accord tribal hunting and fishing regulations the force of federal law by making it a federal offense "to import, export, transport, sell, receive, acquire, or purchase any fish or wildlife . . . taken or possessed in violation of any . . . Indian tribal law." § 3372(a)(1).22

Several considerations strongly support the Court of Appeals' conclusion that the Tribe's authority to regulate hunting and fishing preempts State jurisdiction. It is important to emphasize that concurrent jurisdiction would effectively nullify the Tribe's authority to control hunting and fishing on the reservation. Concurrent jurisdiction would empower New Mexico wholly to supplant tribal regulations. The State would be able to dictate the terms on which nonmembers are permitted to utilize the reservation's resources. The Tribe would thus exercise its authority over the reservation only at the sufferance of the State. The tribal authority to regulate hunting and fishing by nonmembers, which has been repeatedly confirmed by federal treaties and laws and which we explicitly recognized in Montana v. United States, supra, would have a rather hollow ring if tribal authority amounted to no more than this.

Furthermore, the exercise of concurrent State jurisdicti n in this case would completely "disturb and disarrange", Warren Trading Post Co. v. Arizona Tax Comm'n, 380 U.S. 685, 691, 85 S.Ct. 1242, 1245, 14 L.Ed.2d 165 (1965), the comprehensive scheme of federal and tribal management established pursuant to federal law. As described above, supra, at 326, federal law requires the Secretary to review each of the Tribe's hunting and fishing ordinances. Those ordinances are based on the recommendations made by a federal range conservationist employed by the Bureau of Indian Affairs. Moreover, the Bureau of Sport Fisheries and Wildlife stocks the reservation's waters based on its own determinations concerning the availability of fish, biological requirements, and the fishing pressure created by on-reservation fishing. App. 71.23

Concurrent State jurisdiction would supplant this regulatory scheme with an inconsistent dual system: members would be governed by Tribal ordinances, while nonmembers would be regulated by general State hunting and fishing laws. This could severely hinder the ability of the Tribe to conduct a sound management program. Tribal ordinances reflect the specific needs of the reservation by establishing the optimal level of hunting and fishing that should occur, not simply a maximum level that should not be exceeded. State laws in contrast are based on considerations not necessarily relevant to, and possibly hostile to, the needs of the reservation. For instance, the ordinance permitting a hunter to kill a buck and a doe was designed to curb excessive growth of the deer population on the reservation. App. at 153-154. Enforcement of the State regulation permitting only buck to be killed would frustrate that objective. Similarly, by determining the Tribal hunting seasons, bag limits, and permit availability, the Tribe regulates the duration and intensity of hunting. These determinations take into account numerous factors, including the game capacity of the terrain, the range utilization of the game animals, and the availability of tribal personnel to monitor the hunts. Permitting the State to enforce different restrictions simply because they have been determined to be appropriate for the State as a whole would impose on the Tribe the possibly insurmountable task of ensuring that the patchwork application of State and Tribal regulations remains consistent with sound management of the reservation's resources.

Federal law commits to the Secretary and the Tribal Council the responsibility to manage the reservation's resources. It is most unlikely that Congress would have authorized, and the Secretary would have established, financed, and participated in Tribal management if it were thought that New Mexico was free to nullify the entire arrangement.24 Requiring Tribal ordinances to yield whenever State law is more restrictive would seriously "undermine the Secretary's [and the Tribe's] ability to make the wide range of determinations committed to [their] authority." Bracker, supra, 448 U.S., at 149, 100 S.Ct., at 2586. See Fisher v. District Court, 424 U.S. 382, 390, 96 S.Ct. 943, 948, 47 L.Ed.2d 106 (1976) (per curiam); United States v. Mazurie, 419 U.S. 544, 95 S.Ct. 710, 42 L.Ed.2d 706 (1975).25

The assertion of concurrent jurisdiction by New Mexico not only would threaten to disrupt the federal and tribal regulatory scheme, but would also threaten Congress' overriding objective of encouraging tribal self-government and economic development. The Tribe has engaged in a concerted and sustained undertaking to develop and manage the reservation's wildlife and land resources specifically for the benefit of its members. The project generates funds for essential tribal services and provides employment for members who reside on the reservation. This case is thus far removed from those situations, such as on-reservation sales outlets which market to nonmembers goods not manufactured by the tribe or its members, in which the tribal contribution to an enterprise is de minimis. See Washington v. Confederated Tribes, 447 U.S. 134, 154-159, 100 S.Ct. 2069, 2081-2084, 65 L.Ed.2d 10 (1980).26 The Tribal enterprise in this case clearly involves "value generated on the reservation by activities involving the Trib[e]." Id., at 156-157, 100 S.Ct., at 2082-2083. The disruptive effect that would result from the assertion of concurrent jurisdiction by New Mexico would plainly "stan[d] as an obstacle to the accomplishment of the full purposes and objectives of Congress," Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3402-3403, quoting Hines v. Davidowitz, 312 U.S. 52, 67, 61 S.Ct. 399, 404, 85 L.Ed. 581 (1941).

The State has failed to "identify any regulatory function or service . . . that would justify" the assertion of concurrent regulatory authority. Bracker, supra, 448 U.S., at 148, 100 S.Ct., at 2586. The hunting and fishing permitted by the Tribe occur entirely on the reservation. The fish and wildlife resources are either native to the reservation or were created by the joint efforts of the Tribe and the Federal Government. New Mexico does not contribute in any sig ificant respect to the maintenance of these resources, and can point to no other "governmental functions it provides," Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3401, in connection with hunting and fishing on the reservation by nonmembers that would justify the assertion of its authority.

The State also cannot point to any off-reservation effects that warrant State intervention. Some species of game never leave tribal lands, and the State points to no specific interest concerning those that occasionally do. Unlike Puyallup Tribe v. Washington Game Dept., supra, this is not a case in which a Treaty expressly subjects a tribe's hunting and fishing rights to the common rights of nonmembers and in which a State's interest in conserving a scarce, common supply justifies State intervention. 433 U.S., at 174, 175-177, 97 S.Ct., at 2622, 2622-2623. The State concedes that the Tribe's management has not had an adverse impact on fish and wildlife outside the reservation." Appendix to Brief in Opposition 35a.27

We recognize that New Mexico may be deprived of the sale of state licenses to nonmembers who hunt and fish on the reservation, as well as some federal matching funds calculated in part on the basis of the number of State licenses sold.28 However, any financial interest the State might have in this case is simply insufficient to justify the assertion of concurrent jurisdiction. The loss of revenues to the State is likely to be insubstantial given the small numbers of persons who purchase tribal hunting licenses.29 Moreover, unlike Confederated Tribes, supra, and Moe, supra, the activity involved here concerns value generated on the reservation by the tribe. Finally, as already noted, supra, at 342, the State has pointed to no services it has performed in connection with hunting and fishing by nonmembers which justify imposing a tax in the form of a hunting and fishing license, Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3402; Central Machinery Co. v. Arizona Tax Comm'n, 448 U.S., at 174, 100 S.Ct., at 2601 (POWELL, J., concurring), and its general desire to obtain revenues is simply inadequate to justify the assertion of concurrent jurisdiction in this case. See Bracker, supra, 448 U.S., at 150, 100 S.Ct., at 2587; Ramah Navajo School Bd., supra, --- U.S., at ----, 102 S.Ct., at 3402.30

In this case the governing body of an Indian Tribe, working closely with the Federal Governme t and under the authority of federal law, has exercised its lawful authority to develop and manage the reservation's resources for the benefit of its members. The exercise of concurrent jurisdiction by the State would effectively nullify the Tribe's unquestioned authority to regulate the use of its resources by members and nonmembers, interfere with the comprehensive tribal regulatory scheme, and threaten Congress' firm commitment to the encouragement of tribal self-sufficiency and economic development. Given the strong interests favoring exclusive tribal jurisdiction and the absence of State interests which justify the assertion of concurrent authority, we conclude that the application of the State's hunting and fishing laws to the reservation is preempted.

Accordingly, the judgment of the Court of Appeals is

Affirmed.