; (3) affect any contract or agreement between the Bureau of Indian Affairs and the Bureau of Reclamation; (4) affect, waive, abrogate, diminish, define, or interpret the treaty between the Yakama Nation and the United States; or (5) constrain the continued authority of the Secretary to provide fish passage in the Yakima Basin in accordance with the Hoover Power Plant Act of 1984 ( 43 U.S.C. 619 et seq.). 1214. Operational control of water supplies The Secretary shall retain authority and discretion over the management of project supplies to optimize operational use and flexibility to ensure compliance with all applicable Federal and State laws, treaty rights of the Yakama Nation, and legal obligations, including those contained in this Act. That authority and discretion includes the ability of the United States to store, deliver, conserve, and reuse water supplies deriving from projects authorized under this title. .