; and (B) quantifies or otherwise defines any water right of the Indian Tribe. . (c) Establishment Section 402 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 458bb ) is amended to read as follows: 402. Tribal Self-Governance Program (a) Establishment The Secretary shall establish and carry out a program within the Department to be known as the Tribal Self-Governance Program . (b) Selection of participating Indian Tribes (1) In general (A) Eligibility The Secretary, acting through the Director of the Office of Self-Governance, may select not more than 50 new Indian Tribes per year from those tribes eligible under subsection (c) to participate in self-governance. (B) Joint participation On the request of each participating Indian Tribe, two or more otherwise eligible Indian Tribes may be treated as a single Indian Tribe for the purpose of participating in self-governance. (2) Other authorized Indian Tribe or Tribal organization If an Indian Tribe authorizes another Indian Tribe or a Tribal organization to plan for or carry out a program on its behalf under this title, the authorized Indian Tribe or Tribal organization shall have the rights and responsibilities of the authorizing Indian Tribe (except as otherwise provided in the authorizing resolution). (3) Joint participation as organization Two or more Indian Tribes that are not otherwise eligible under subsection (c) may be treated as a single Indian Tribe for the purpose of participating in self-governance as a Tribal organization if— (A) each Indian Tribe so requests