Opinion for the court filed by Circuit Judge J. SKELLY WRIGHT.
[247]*247Concurring and dissenting opinion filed by Circuit Judge MacKINNON.
J. SKELLY WRIGHT, Circuit Judge:
Petitioners seek review of the Federal Power Commission’s Opinion No. 664,1 which held that the Commission has authority, under the relicensing section of the Federal Power Act,2 to grant a new long-term license or an interim annual license for FPC Project No. 108 despite the refusal of petitioner Lac Courte Oreilles Band of Lake Superior Chippewa Indians (the Band) to consent to further use by the licensee (intervenor Northern States Power Company (Northern States)) of tribal lands underlying the project. Petitioners also object to the Commission’s issuance of annual licenses for Project No. 108 in 1972 and 1973. We hold that, under the circumstances of this case, the FPC was required to issue the annual licenses to the intervenor. In light of this disposition we hold that, pending the continuing administrative proceedings described below,3 the question of the Commission’s authority to license tribal lands notwithstanding tribal unwillingness to assent to such licensing is not ripe for review, although we believe the Commission premised its holding on an erroneous assumption and should therefore reevaluate its opinion, taking account of any relevant material being developed in the current proceedings.
I
FPC Project No. 108 is a reservoir and dam across the Chippewa River in Wisconsin consisting of approximately 29,000 acres, 525 of which are situated on tribal lands of the Band.4 Although the project itself produces no power, it is operated as a storage reservoir to regulate the flow of the Chippewa River for seven downstream hydroelectric plants. As part of a comprehensive system of headwater improvements on the Chippewa and Wisconsin Rivers and their tributaries, Project No. 108 was constructed pursuant to a 50-year license issued by the FPC on August 8, 1921 to the predecessor of intervenor Northern States, the current licensee.
Prior to expiration of the original license in 1971, Northern States filed with the FPC an application for a new license. No other license applications to operate Project No. 108 have been filed, although the United States Department of Agriculture, Forest Service, and the United States Department of the Interi- or have recommended that the United [248]*248States take over, or “recapture,” operation and maintenance of Project No. 108 pursuant to Section 14 of the Federal Power Act.5 Petitioners, who intervened 6 in the hearings concerning the recapture-relicensing issue,7 have expressed their desire for federal recapture of the project8 while asserting their objections to Northern States’ operation for eventual power generating purposes.9
[249]*249In petitioning to intervene before the Commission in the recapture-relicensing proceeding, the Band maintained that, pursuant to Section 16 of the Indian Reorganization Act of 1934,10 it had the power.to prevent any unwanted use of tribal lands by a Commission licensee, and that, since the existence and operation of Project No. 108 disrupted the Band’s culture, affronted its respect for the environment, and prevented the growth of the Band’s traditional staple, wild rice, it denied its permission for further use of its land for the project. Moreover, the Band claimed that issuance of any license over this denial would be contrary to the terms of the Treaty of 1854 which established the Lac Courte Oreilles Reservation; since the Commission purportedly could not therefore make the requisite finding under Section 4(e) of the Federal Power Act that “the license will not interfere or be inconsistent with the purpose for which
such reservation was created or acquired,” 11 it allegedly lacked jurisdiction to issue a new license. Based on these assertions, the Band moved to restrict all future hearings on Project No. 108 to the issue of federal recapture, and to exclude any consideration of Northern States’ application for a new license. The Commission denied this motion,12 and that ruling was not appealed.
During the course of these still pending recapture-relicensing proceedings, the Commission’s secretary, acting pursuant to Section 15(a) of the Federal Power Act,13 issued interim annual licenses to Northern States in August of 1971, 1972, and 1973. On September 1, 1972 the Band filed an application for rehearing concerning the secretary’s public notice that the second of these annual licenses for Project No. 108 was issued to Northern States for the period August 8, 1972 to August 7, 1973.14 In [250]*250granting the motion for rehearing, the Commission directed the parties to submit briefs “on the question of the jurisdiction of this Commission to issue both an annual license and a new license in Project No. 108 without the consent of the Lac Courte Oreilles Band.”15 After this briefing was completed the Commission, on August 6, 1973, issued the third annual license to Northern States, conditioning the grant on the fact that should the Commission decide, based on the previously submitted briefs, that it did not have jurisdiction to issue such an annual license, the license would terminate as of the date of the Commission’s opinion. On August 31, 1973 the Band applied for a rehearing with respect to issuance of that license, and on September 5, 1973 a similar application was filed by several intervenors.16 These petitions repeated the substance of the claims made by the Band in the recapture-relicensing proceedings.
On September 14, 1973 the Commis- . sion issued Opinion No. 664, the subject of this appeal. In concluding that opinion, the Commission declared:
(A) In exercising the authority conferred upon it by section 15 of the Federal Power Act, the Commission may grant a new license or an annual license for Project No. 108, notwithstanding the unwillingness of the Lac Courte Oreilles Band of Lake Superior Chippewa Indians to consent to the use by the licensee of tribal lands underlying such project.
(B) The petition and application for rehearing, filed herein on September 1, 1972, and the applications for rehearing filed on August 31, 1973, and September 5, 1973, are denied.17
However, the Commission explicitly stated that its opinion was not to be construed as indicating any predisposition on the issues of recapture and relicensing, or as a finding under Section 4(e) of the Federal Power Act that a new license could issue consistent with the purposes for which the reservation was established; 18 these issues are the subject of administrative hearings which, as already noted, are still pending.
Commissioner Moody nevertheless dissented, stating:
[W]e cannot, as a matter of law make the essential finding required by 4(e).
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Opinion for the court filed by Circuit Judge J. SKELLY WRIGHT.
[247]*247Concurring and dissenting opinion filed by Circuit Judge MacKINNON.
J. SKELLY WRIGHT, Circuit Judge:
Petitioners seek review of the Federal Power Commission’s Opinion No. 664,1 which held that the Commission has authority, under the relicensing section of the Federal Power Act,2 to grant a new long-term license or an interim annual license for FPC Project No. 108 despite the refusal of petitioner Lac Courte Oreilles Band of Lake Superior Chippewa Indians (the Band) to consent to further use by the licensee (intervenor Northern States Power Company (Northern States)) of tribal lands underlying the project. Petitioners also object to the Commission’s issuance of annual licenses for Project No. 108 in 1972 and 1973. We hold that, under the circumstances of this case, the FPC was required to issue the annual licenses to the intervenor. In light of this disposition we hold that, pending the continuing administrative proceedings described below,3 the question of the Commission’s authority to license tribal lands notwithstanding tribal unwillingness to assent to such licensing is not ripe for review, although we believe the Commission premised its holding on an erroneous assumption and should therefore reevaluate its opinion, taking account of any relevant material being developed in the current proceedings.
I
FPC Project No. 108 is a reservoir and dam across the Chippewa River in Wisconsin consisting of approximately 29,000 acres, 525 of which are situated on tribal lands of the Band.4 Although the project itself produces no power, it is operated as a storage reservoir to regulate the flow of the Chippewa River for seven downstream hydroelectric plants. As part of a comprehensive system of headwater improvements on the Chippewa and Wisconsin Rivers and their tributaries, Project No. 108 was constructed pursuant to a 50-year license issued by the FPC on August 8, 1921 to the predecessor of intervenor Northern States, the current licensee.
Prior to expiration of the original license in 1971, Northern States filed with the FPC an application for a new license. No other license applications to operate Project No. 108 have been filed, although the United States Department of Agriculture, Forest Service, and the United States Department of the Interi- or have recommended that the United [248]*248States take over, or “recapture,” operation and maintenance of Project No. 108 pursuant to Section 14 of the Federal Power Act.5 Petitioners, who intervened 6 in the hearings concerning the recapture-relicensing issue,7 have expressed their desire for federal recapture of the project8 while asserting their objections to Northern States’ operation for eventual power generating purposes.9
[249]*249In petitioning to intervene before the Commission in the recapture-relicensing proceeding, the Band maintained that, pursuant to Section 16 of the Indian Reorganization Act of 1934,10 it had the power.to prevent any unwanted use of tribal lands by a Commission licensee, and that, since the existence and operation of Project No. 108 disrupted the Band’s culture, affronted its respect for the environment, and prevented the growth of the Band’s traditional staple, wild rice, it denied its permission for further use of its land for the project. Moreover, the Band claimed that issuance of any license over this denial would be contrary to the terms of the Treaty of 1854 which established the Lac Courte Oreilles Reservation; since the Commission purportedly could not therefore make the requisite finding under Section 4(e) of the Federal Power Act that “the license will not interfere or be inconsistent with the purpose for which
such reservation was created or acquired,” 11 it allegedly lacked jurisdiction to issue a new license. Based on these assertions, the Band moved to restrict all future hearings on Project No. 108 to the issue of federal recapture, and to exclude any consideration of Northern States’ application for a new license. The Commission denied this motion,12 and that ruling was not appealed.
During the course of these still pending recapture-relicensing proceedings, the Commission’s secretary, acting pursuant to Section 15(a) of the Federal Power Act,13 issued interim annual licenses to Northern States in August of 1971, 1972, and 1973. On September 1, 1972 the Band filed an application for rehearing concerning the secretary’s public notice that the second of these annual licenses for Project No. 108 was issued to Northern States for the period August 8, 1972 to August 7, 1973.14 In [250]*250granting the motion for rehearing, the Commission directed the parties to submit briefs “on the question of the jurisdiction of this Commission to issue both an annual license and a new license in Project No. 108 without the consent of the Lac Courte Oreilles Band.”15 After this briefing was completed the Commission, on August 6, 1973, issued the third annual license to Northern States, conditioning the grant on the fact that should the Commission decide, based on the previously submitted briefs, that it did not have jurisdiction to issue such an annual license, the license would terminate as of the date of the Commission’s opinion. On August 31, 1973 the Band applied for a rehearing with respect to issuance of that license, and on September 5, 1973 a similar application was filed by several intervenors.16 These petitions repeated the substance of the claims made by the Band in the recapture-relicensing proceedings.
On September 14, 1973 the Commis- . sion issued Opinion No. 664, the subject of this appeal. In concluding that opinion, the Commission declared:
(A) In exercising the authority conferred upon it by section 15 of the Federal Power Act, the Commission may grant a new license or an annual license for Project No. 108, notwithstanding the unwillingness of the Lac Courte Oreilles Band of Lake Superior Chippewa Indians to consent to the use by the licensee of tribal lands underlying such project.
(B) The petition and application for rehearing, filed herein on September 1, 1972, and the applications for rehearing filed on August 31, 1973, and September 5, 1973, are denied.17
However, the Commission explicitly stated that its opinion was not to be construed as indicating any predisposition on the issues of recapture and relicensing, or as a finding under Section 4(e) of the Federal Power Act that a new license could issue consistent with the purposes for which the reservation was established; 18 these issues are the subject of administrative hearings which, as already noted, are still pending.
Commissioner Moody nevertheless dissented, stating:
[W]e cannot, as a matter of law make the essential finding required by 4(e). By treaty and by statute, the Lac Courte Oreilles Band has been given sovereignty over tribal lands; this was, and continues to be, the “purpose for which such reservation was created.” With the Band’s unequivocal rejection of use of tribal lands by Northern States or any Commission licensee for power purposes, we have no lawful basis for the issuance of a license.19
II
Section 15(a) of the Federal Power Act, 16 U.S.C. § 808(a) (1970), provides:
If the United States does not, at the expiration of the original license, exercise its right to take over, maintain, and operate any project or projects of the licensee, as Drovided in section 807 of this title,
(Emphasis added.) Defending its grant of annual licenses to Northern States under this provision, the Commission asserted:
In this proceeding, the conditions aré met: the United States had not exercised its right to take over, and a new license has not been granted. The operative word is “shall”. We had no option not to issue annual licenses in August 1971, 1972, and 1978 to the Northern States Power Compa-■Qy ^ ^ ^ 21
In essence, petitioners argue that this literal interpretation of Section 15, which accords the FPC a purely ministerial and nondiscretionary function in the issuance of interim annual licenses, leads to incongruous results. Reasoning from the premise that the Treaty of 1854 and Section 16 of the Indian Reorganization Act do in fact accord the Band a veto power over undesired Commission licens[252]*252ing of its tribal lands, petitioners contend that this power would be vitiated unless Section 15 were interpreted to require annual licenses only when the Commission has jurisdiction to grant a new license under Section 4(e) of the Federal Power Act.22 This contention is supported by the hypothetical of a perpetual license: if the Band vetoes a proposed Section 4(e) license utilizing its lands, a literal interpretation of Section 15(a) would require annual licenses to issue until either congressional recapture of the project or other disposition under Commission order. But if Congress does not desire to recapture the project, the annual licenses would issue indefinitely, yielding a result which, under the hypothesis of a tribal veto of a long-term license, could not be directly achieved by the Commission. This result would therefore frustrate the presumed powers conferred on the Band by the Treaty of 1854 and the Indian Reorganization Act.23 Thus the Band contends that if it in fact possesses the power to veto any r.elicensing of the project, it necessarily follows that, in order to avoid the incongruity of indefinite annual licensing, it must also have, the power to veto any interim annual license for the project.24 As Commissioner Moody stated in accepting the Band’s contentions in his dissent to Opinion No. 664, “the annual licensing provisions of Section 15(a) must be read as authorizing annual licenses only in those instances where the Commission is empowered to act on a relicense application.”25
Assuming arguendo that the Commission erred in holding that it has the legal authority to issue a new license for Project No. 108 encompassing Indian tribal lands despite objections of the tribe with sovereignty over those lands, we agree with the Commission that Section 15(a) mandates the grant of annual licenses under the circumstances of this case. Not only the plain language of the statute, but also the legislative history of and the policies served by Section 15(a) support this result. However, since we believe the Band would be in error in its suggested interpretation of Section 15(a) even if it were correct in its claim to possess a veto power over issuance of long-term licenses, we feel constrained to amplify somewhat on the Commission’s relatively opaque reasoning.
The basic fallacy of the Band’s interpretation of Section 15(a) lies in its assumption that “the Commission’s authority to issue annual licenses derives from its concurrent consideration of a perfected application for a new license, and not from the expiring or expired license.”26 Congress fashioned Section [253]*25315 to prevent abrupt termination of a power project which should, in the public interest, be continued, but with respect to which the identity of the operator and the exact method of operation must be reevaluated.27 Admittedly, one possible disposition by the Commission at the expiration of a license would be issuance of a new license to a new applicant or to the original licensee. However, another possible disposition would entail a congressional decision to recapture the project. Indeed, Section 15(a) specifies that the Commission only has authority to issue a new long term license if Congress fails to exercise its recapture option.28 Section 15(a) annual licenses are designed to prevent a possible hiatus in the operation of a project while either of these decisions is being made, preserving the status quo at the expiration of a long-term license and thereby guaranteeing that “industries created by [Commission projects] and dependent upon them may not suffer.”29 The Band does not contend, that Congress is without power to abrogate prior treaties or statutes concerning Indian tribal lands, so long as Congress acts with sufficiently specific intent and complies with constitutional requirements of due process and just compensation.30 And the Band accepts the fact that congressional action on recapture of Project No. 108 would constitute such a specific action respecting the relevant tribal lands.31 What the Band apparently fails to appreciate, however, is that by requiring issuance of annual licenses pending such congressional action, Section 15 affords the Commission and Congress time to make a reasoned decision concerning the desirability of federal takeover of a project, at the same time preserving the status quo while that decision is being made.
That Congress intended Section 15 to preserve its option of making a careful, deliberate judgment concerning disposition of a project at the expiration of an initial license term is evident in the legislative history of the 1968 amendments to the Federal Power Act, by which Congress established efficient, consolidated recapture-relicensing procedures.32 Congress specifically indicated
that if, after notice and opportunity for hearing, the Commission determines that the United States should take over any project or projects for public purposes, the Commission shall not issue a new license but shall submit its recommendation to Congress, together with such information as it considers appropriate. Until the Congress acts there would be an annual renewal of the expired license as provided under existing law.33
[254]*254Moreover, Congress had been made aware by the Commission that one of the fundamental choices upon license termination occurs when the licensee wants to abandon a project (and presumably fails to apply for a new license), but the public interest dictates that it be maintained in whole or in part for nonpower purposes.34 Admittedly, this could be effectuated by grant of a nonpower license to a new applicant,35 but it could also be done, in the absence of any application for a license for either power or nonpower use, through federal recapture of the project. And as indicated above, annual licenses were to issue until that congressional decision was made. It would indeed be anomalous if Section 15, which is plain on its face, were arbitrarily construed to deny Congress an opportunity to guarantee the continued operation of a project which the Government believes should be maintained in the public interest, but which no private concern believes would be feasible to operate and for which no new license applications are submitted at the expiration of an initial license period. And the situation is absolutely analogous when the Commission lacks authority to issue a new license, but considers the project so important for the public good that Congress should be presented with the opportunity to either take over operation of the project or otherwise institute proceedings that would ensure continued private operation.36 Section 15 is the vehicle by which Congress reserved the option of taking such action on a project without detrimentally affecting the status quo during its deliberations.37
Thus, even if we were to hold that the Indian Reorganization Act and the Treaty of 1854 conferred a veto power upon the Lac Courte Oreilles Band of [255]*255Lake Superior Chippewa Indians with respect to grant of a new license or relicensing of Northern States, we would have to hold that the recapture-relicensing proceedings now pending before the Commission could continue, although limited to the issue of federal recapture. And pending a final determination of that issue, Section 15 embodies the congressional intent that licenses must issue to Northern States. Whatever the rights of a tribe to prevent an initial licensing of a project, once such a license has been issued Section 15 renders those rights subordinate to the congressional right to determine the most efficient and desirable disposition of that project upon the termination of that license.38
Nor need we worry about the possibility that Congress will in the end decide against federal recapture. Section 15 was fashioned to afford Congress the opportunity to make such a determination; its operative effect cannot be conditioned on speculation as to how Congress will utilize that opportunity. As long as Congress and the Commission are proceeding with due diligence in making a recapture determination (even under the' hypothesis that relicensing is precluded due to lack of tribal consent), it is reasonable to interpret the language of the statute, to dictate what its language plainly requires — “the commission shall issue from year to year an annual license to the then licensee under the terms and conditions of the original license until the property is taken over or a new license is issued.” (Emphasis added.) Indeed, we see no escape from holding that under the circumstances of this case, Northern States not only had the right, but also the obligation, to operate Project No. 108 under interim annual licenses. Considering the purposes served by Section 15, this result is as wise as .a matter of policy as it is necessary as a matter of law.
The propriety of this interpretation is underscored by the circumstances of the case before us. As indicated above, the Commission is gathering data and opinions on which to base its recapture recommendations for Project No. 108 in a consolidated recapture-relicensing proceeding, as mandated by the 1968 amendments to the Federal Power Act. Federal recapture of the project has been strenuously urged at those hearings by the Departments of Agriculture and the Interior; the Band, while continuously expressing its disapproval of any relicensing of its tribal lands that would permit operation of the storage reservoir as part of a power-generating system, has acquiesced in their proposal for recapture, under which the Government would operate the reservoir in a more environmentally acceptable manner.39 But if annual licenses cannot lawfully issue pending resolution of the recapture issue, the option of maintaining a reservoir under any circumstances may be lost. For although only 525 of the 29,-000 acres within the project are situated on Indian tribal lands, a portion of those [256]*256tribal lands is so located that restoration of the lands to the tribe would require that the dam be removed and the whole reservoir drained.40 Moreover, the parties stipulated in oral argument that although the record in the recapture-relicensing proceeding had been closed, the Band and the Departments of Agriculture and the Interior had moved to reopen it for the purpose of introducing further evidence supporting recapture; this motion was opposed by Northern States, which was willing to have the recapture-relicensing decision made as expeditiously as possible. It is thus clear that the Commission is diligently attempting to make a recapture-relicénsing determination, and that delay in reaching an ultimate resolution of that question is in fact attributable to closer examination of the recapture option which the Band wants Congress to exercise.40A
We of course recognize the merits of the Band’s contention that the literal language of Section 15 could produce absurd results in the hypothetical “perpetual license” situation.41 But as the Commission noted:
We will not address ourselves to the hypothetical question of a perpetual franchise. We instead observe that annual licenses for Project No. 108 will cease when this proceeding is completed.42
We are confident that the Commission intended by this statement to indicate that if recapture were not effectuated and it could not make the Section 4(e) finding requisite for issuance of a new long-term license, it would not regard Section 15 as mandating indefinite annual licensing. Such an interpretation is, we believe, necessary to a coherent and reasonable interpretation of Section 15.43 But short of that eventuality, Section 15 requires interim annual licenses. For as our previous discussion should make clear, Section 15 contemplates annual licenses to preserve either the alternative of issuing a new license or that of federal recapture. Even if the alternative of a new license is obviated, whether because no applications for a long-term license are filed or because the Commission lacks authority for any reason to issue a new license, Section 15 does not lead to absurd results since it preserves the congressional option to act. However, if Congress decides against federal recapture, then continued operation of [257]*257Section 15 would indeed serve no rational purpose if a new license cannot issue. Under the circumstances of the case sub judice, this would mean that if Congress does not recapture the project,44 the Band could litigate its contention that the Indian Reorganization Act and relevant treaty provisions vest it with a veto power which deprives the Commission of all authority to issue any licenses over its failure to assent.
Ill
As should be evident from our discussion of the validity of the annual licenses which have been issued to Northern States, our decision in no way turns upon the Commission’s authority vel non to issue a long term license for Project No. 108 over the objections of the tribe with sovereignty over the affected lands. Moreover, the Commission may recommend federal recapture of the project or may be unable, for a variety of reasons, to make the Section 4(e) determination that a new license “will not interfere or be inconsistent with”45 the purpose for which the Lac Courte Oreilles Band of Lake Superior Chippewa Indians’ reservation was established. Either of these results would moot the controversy and avoid the necessity of our passing on the question of the Commission’s power to effectively ignore the Band’s objections to the long-term licensing of its tribal lands for power generating purposes. Thus, since interim annual licenses must issue in any event while the recapturerelicensing hearings proceed, the Commission’s ruling does not now have an immediate and significant impact upon petitioners. Moreover, our review of the authority of the Commission to license Northern States over the Band’s lack of assent may be further informed by developments in those recapture-relicensing proceedings now being conducted by the Commission, should the Commission issue a new license and thereby render review necessary and appropriate. We hold that, in this posture, the determination of the Commission is not ripe for review.46 Although we therefore decline to vacate Opinion No. 664 or to decide the basic question addressed therein, we nevertheless believe that in our role as a reviewing court we have an obligation to point out a plain error in the opinion which, if not corrected, might cause unnecessary delay and waste of Commission and judicial resources in any later review proceedings.
Having determined that the affected tribal lands were part of a “reservation” within the meaning of the Federal Power Act,47 the Commission observed:
The issue, as we see it, is whether we are dealing with a “reservation” for [258]*258purposes of the Power Acts, not what kind of rights or interests the pertinent Indians have in that reservation. * * * Congress, by enacting the Federal Water Power Act of 1920, abrogated the 1854 Treaty [with the Chippewas] to the extent necessary to permit construction of hydroelectric projects on the lands reserved to the Band.
Two provisions of the 1920 Act, contained in sections 4(d) and 10(e), make plain the Congress’ intent to authorize the Federal Power Commission to exercise its responsibilities with respect to land on Indian reservations. Section 4(d) authorized the Commission to issue licenses for hydroelectric projects “along, from or in any of the navigable waters of the United States, or upon any part of the public lands and reservations of the United States”; and the section further provided
That licenses shall be issued within any reservation only after a finding by the commission that the license will not interfere or be inconsistent with the purpose for which such reservation was created or acquired, and shall be subject to and contain such conditions as the Secretary of the department under whose supervision such reservation falls shall deem necessary for the adequate protection and utilization of such reservation . . . (41 Stat. 1065).
Section 10(e) of the 1920 Act provided for the payment by the licensee to the United States of reasonable annual charges, with the proviso
That when licenses are issued involving the use of Government dams or other structures owned by the United States or tribal lands embraced within Indian reservations the commission shall fix a reasonable annual charge for the use thereof .. . (41 Stat. 1069).
In our judgment, these explicit references in the 1920 Act to the licensing of projects on Indian reservations make clear the Congress’ purpose to abrogate such a treaty as that of September 30, 1854, if necessary and to the extent necessary to permit the licensing by the Federal Power Commission of projects on Indian reserved land. We thus hold that the rights of the Lac Courte Oreilles Band under the 1854 Treaty were diminished by the Congress to the extent necessary to permit the Commission to exercise the licensing authority conferred upon it by the Federal Water Power Act of 1920.
* * * * * *
[W]e reach that conclusion in light of the plain statutory language. That is, the land made available for the “use” of the Band under the 1854 Treaty was, subsequently, also made subject to the authority of this Commission, this as shown by section [sic] 3, 4(d), and 10(e) of the 1920 Act and corresponding sections of the 1935 Act; and if the Treaty and the statutes are in conflict, the later in time prevails.48
The logic behind this reasoning escapes us. There is no doubt that the 1920 Act, as the Commission argues and the quoted provisions indicate, gave the Commission authority to issue licenses affecting Indian tribal lands. Yet it is also plain that the Act conditioned the Commission’s authority to grant such licenses on its ability to find “that the license will not interfere or be inconsistent with the purpose for which such reservation was created.” This determination can obviously only be made by ascertaining the rights conferred upon the Band by the treaties establishing the reservation. Indeed, if those rights are automatically abrogated to the extent necessary to allow every license the Commission wishes to issue, it is difficult to see why the Commission need make any determination under Section 4(e) in the [259]*259pending recapture-relicensing proceedings. Yet the Commission, in Opinion No. 664, inconsistently stated that such a determination would still be required.49
We intimate no views as to what rights the relevant treaties confer upon the Band, or what light Section 16 of the Indian Reorganization Act50 and the later 1935 amendments to Section 10(e) of the Federal Water Power Act51 shed upon the existence or scope of those rights. These are issues which need not now be reached, and which we leave to the Commission to ascertain before it decides to issue any new license for Project No. 108. We merely wish to indicate to the Commission that those rights must be assessed, as required by Section 4(e), as a precondition to issuance of any long-term license affecting the Band’s tribal lands.
The issuance to Northern States of interim annual licenses is affirmed, and the question of whether the Section 4(e) determination can be made despite the Band’s failure to assent to any further long-term licenses covering its tribal lands is left to the Commission for further consideration in the pending recapture-relicensing proceedings.
So ordered.
20. See note 5 supra.