; and (2) any accomplishments resulting from the use of a withdrawal under a Tribal management plan, in accordance with this Act. (j) OM&R costs Except as otherwise provided in this Act, nothing in this Act affects any obligation of the United States with respect to the operations, maintenance, and repair of the Flathead Indian irrigation project. 9. Authorization of appropriations (a) In general There is authorized to be appropriated to the Secretary for deposit in the Trust Fund $1,900,000,000, to remain available until expended, withdrawn, or reverted to the general fund of the Treasury. (b) Fluctuation in costs (1) In general Of the amount authorized to be appropriated under 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