; and (2) for deposit in the Pueblo of Zia Settlement Trust Fund established under that section $200,000,000, to remain available until expended, withdrawn, or reverted to the general fund of the Treasury. (b) Fluctuation in costs (1) In general The amount 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, as indicated by the Bureau of Reclamation Construction Cost Index–Composite Trend. (2) Construction costs adjustment The amount 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 applicable amount, as adjusted, has been appropriated. (4) Period of indexing The period of indexing adjustment under this subsection for any increment of funding shall start on October 1, 2021, and end on the date on which the funds are deposited in the applicable Pueblo Trust Fund. (c) State cost share The State shall contribute— (1) $3,400,000, as adjusted for inflation pursuant to the Agreement, to the San Ysidro Community Ditch Association for capital and operating expenses of the mutual benefit Augmentation Project; (2) $16,159,000, as adjusted for inflation pursuant to the Agreement, for Jemez River Basin Water Users Coalition acequia ditch improvements