what operation, maintenance, and replacement costs of that section of the Project serving the Jicarilla Apache Nation are in excess of the ability of the Jicarilla Apache Nation to pay. (2) Establishment Upon completion of the Ability to Pay study as set forth in paragraph (1), the Secretary shall establish a trust fund to be known as the Jicarilla Apache Nation Operations, Maintenance, and Replacement Trust Fund for the purposes set forth in paragraph (3), to be managed, invested, and distributed by the Secretary and to remain available until expended, withdrawn, or reverted to the general fund of the Treasury, consisting of the amounts deposited in the trust fund under paragraph (4), together with any interests earned on those amounts under paragraph (5). (3) Use of funds The Jicarilla Apache Nation may use amounts in the Jicarilla Apache Nation Operations, Maintenance, and Replacement Trust Fund to pay operations, maintenance, and replacement costs of the Project allocable to the Jicarilla Nation under section 10604. (4) Authorization of appropriations There are authorized to be appropriated for deposit in the Jicarilla Apache Nation Operations, Maintenance, and Replacement Trust Fund the amounts the Secretary has determined are in excess of the ability of the Jicarilla Apache Nation to pay in the Ability to Pay study required under paragraph (1) up to a maximum of $10,000,000. (5) Investment Upon deposit of funding into the Jicarilla Apache Nation Operations, Maintenance, and Replacement Trust Fund pursuant to paragraph (4), the Secretary shall invest amounts in the fund in accordance with subsection (e). (6) Investment earnings Any investment earnings, including interest, credited to amounts held in the Jicarilla Apache Nation Operations, Maintenance, and Replacement Trust Fund are authorized to be used in accordance with paragraph (3). (7) Availability Any amount authorized to be appropriated to the Jicarilla Apache Nation Operations, Maintenance, and Replacement Trust Fund under paragraph (4) shall not be