Funding

(a) Funding Out of any funds in the Treasury not otherwise appropriated, the Secretary of the Treasury shall transfer to the Secretary— (1) for deposit in the Tule River Tribe Water Development Projects Account $518,000,000, to be available until expended, withdrawn, or reverted to the general fund of the Treasury; and (2) for deposit in the Tule River Tribe OM&R Account $50,000,000, to be available until expended, withdrawn, or reverted to the general fund of the Treasury. (b) Fluctuation in costs (1) In general The amounts authorized to be appropriated under subsection (a) shall be increased or decreased, as appropriate, by such amounts as may be justified by reason of ordinary fluctuations in costs occurring after November 1, 2020, as indicated by the Bureau of Reclamation Construction Cost Index—Composite Trend. (2) Construction costs adjustment The amounts authorized to be appropriated under subsection (a) shall be adjusted to address construction cost changes necessary to account for unforeseen market volatility that may not otherwise be captured by engineering cost indices as determined by the Secretary, including repricing applicable to the types of construction and current industry standards involved. (3) Repetition The adjustment process under this subsection shall be repeated for each subsequent amount appropriated until the amount authorized, as adjusted, has been appropriated. (4) Period of indexing The period of indexing adjustment under this subsection for any increment of funding shall end on the date on which the funds are deposited into the Trust Fund.