; and (iv) the obligations of the United States Postal Service described in section 2005 of title 39, United States Code; and (E) this section. (2) Investment earnings In addition to the deposits under subsection (d), any investment earnings, including interest, credited to amounts held in the Trust Fund are authorized to be appropriated for use in accordance with subsection (c). (f) Availability of amounts (1) Funding Except as provided in paragraph (3), the amounts made available under this section (including any investment earnings on those amounts) shall be available for expenditure or withdrawal by the Fort Belknap Indian Community without fiscal year limitation beginning on the enforceability date. (2) Other funding In addition to funding specifically made available under this Act, if the Secretary determines that, for a given fiscal year, a sufficient amount of funding has not been made available through annual appropriations or other sources, the Secretary shall expend from the Reclamation Water Settlements Fund established by section 10501(a) of the Omnibus Public Land Management Act of 2009 ( 43 U.S.C. 407(a) ) such amounts as are necessary to pay the Federal share of the costs associated with the Trust Fund. (3) Funding for Tribal implementation activities Notwithstanding paragraph (1), on approval of the Compact by the members of the Fort Belknap Indian Community pursuant to section 10(f)(1), as certified by the Secretary and the Fort Belknap Indian Community, and subject to the availability of appropriations, $4,800,000 of the amounts in the Fort Belknap Indian Community Water Resources and Water Rights Administration, Operation, and Maintenance Account established under subsection (c)(2) shall be made available to the Fort Belknap Indian Community for— (A) the administration of the Tribal water right; and (B) the implementation of— (i) the Compact