FUNDING.

SEC. 9. FUNDING. (a) Funding.— (1) Authorization of appropriations.—There is authorized to be appropriated to the Secretary for deposit in the Trust Fund $1,000,000,000, to remain available until expended, withdrawn, or reverted to the general fund of the Treasury. (2) Mandatory funding.— (A) In general.—On October 1, 2020, and on each October 1 thereafter through October 1, 2029, out of any funds in the Treasury not otherwise appropriated, the Secretary of the Treasury shall deposit in the Trust Fund $90,000,000, to remain available until expended, withdrawn, or reverted to the general fund of the Treasury. (B) Availability.—Amounts deposited in the Trust Fund under subparagraph (A) shall be available without further appropriation. (b) Fluctuation in Costs.— (1) In general.—Of the amounts authorized to be appropriated and appropriated to the Trust Fund under paragraphs (1) and (2), respectively, of subsection (a)— (A) $347,200,000 shall be increased or decreased, as appropriate, by such amounts as may be justified by reason of ordinary fluctuations in costs occurring after the date of enactment of this Act, as indicated by the Consumer Price Index for All Urban Consumers West Urban 50,000 to 1,500,000 index; (B) $111,400,000 shall be increased or decreased, as appropriate, by such amounts as may be justified by reasons of ordinary fluctuations in costs occurring after the date of enactment of this Act, as indicated by the Producer Price Index for the Bureau of Labor Statistics; and (C) $1,441,400,000 shall be increased or decreased, as appropriate, by such amounts as may be justified by reason of ordinary fluctuations in costs occurring after the date of enactment of this Act, as indicated by the Bureau of Reclamation Construction Costs Index-Composite Trend. (2) Requirements for adjustment process.—The adjustment process under this subsection shall— (A) take into account any agreement reached by the Secretary and the Tribes under paragraph (4); and (B) be repeated for each subsequent amount appropriated for deposit in the Trust Fund until the amount authorized to be appropriated, as so adjusted, has been appropriated. (3) Period of indexing.—The period of indexing adjustment under this subsection for any increment of funding shall end on the date on which funds are deposited in the Trust Fund. (4) Agreement.—Based on the activities likely to be conducted using amounts deposited in the Trust Fund, the Secretary and the Tribes may agree on which provisions of paragraph (1) shall govern the fluctuation in costs to be used in calculating the amount authorized to be appropriated under subsection (a)(1). (c) Limitation on Use of Reclamation Water Settlements Fund.—Notwithstanding any other provision of law— (1) no amounts in 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)) may be used by the Tribes or the Secretary to carry out any provision of this Act until the date that is 10 years after the date of enactment of this Act; and (2) effective beginning on the date that is 10 years after that date of enactment, the total amount used by the Tribes and the Secretary to carry out this Act from the Reclamation Water Settlements Fund shall not exceed an amount equal to 50 percent of the total amount in the Fund on that date.