; and (B) as of June 1, 2017, was subject to a preliminary permit issued by the Commission pursuant to section 4(f) of the Federal Power Act ( 16 U.S.C. 797(f) ). (6) Proposed lessee The term proposed lessee means the proposed lessee of a project. (7) Secretary The term Secretary means the Secretary of the Interior. (8) Study plan The term study plan means the plan described in subsection (d)(1). (9) Study plan agreement The term study plan agreement means an agreement entered into under subsection (b)(1) and described in subsection (c). (10) Tribes The term Tribes means— (A) the Confederated Tribes of the Colville Reservation; and (B) the Spokane Tribe of Indians of the Spokane Reservation. (b) Requirement for issuance of leases of power privilege The Secretary shall not issue a lease of power privilege pursuant to section 9(c)(1) of the Reclamation Project Act of 1939 ( 43 U.S.C. 485h(c)(1) ) (as amended by section 2) for a project unless— (1) the proposed lessee and the Tribes have entered into a study plan agreement; or (2) the Secretary or the Director, as applicable, makes a final determination for— (A) a study plan agreement under subsection (c)(2); or (B) a study plan under subsection (d). (c) Study plan agreement requirements (1) In general A study plan agreement shall— (A) establish the deadlines for the proposed lessee to formally respond in writing to comments and study requests about the project previously submitted to the Commission; (B) allow for the parties to submit additional comments and study requests if any aspect of the project, as proposed, differs from an aspect of the project, as described in a preapplication document provided to the Commission; (C) except as expressly agreed to by the parties or as provided in paragraph (2) or subsection (d), require that the proposed lessee conduct each study described in— (i) a study request about the project previously submitted to the Commission; or (ii) any additional study request submitted in accordance with the study plan agreement