; of which such amounts as may be necessary may be advanced to the Colorado River Dam Fund: Provided , That such transfers may be increased or decreased within the overall appropriation under this heading: Provided further , That of the total appropriated, the amount for program activities that can be financed by the Reclamation Fund or the Bureau of Reclamation special fee account established by 16 U.S.C. 6806 shall be derived from that Fund or account: Provided further , That funds contributed under 43 U.S.C. 395 are available until expended for the purposes for which the funds were contributed: Provided further , That funds advanced under 43 U.S.C. 397a shall be credited to this account and are available until expended for the same purposes as the sums appropriated under this heading: Provided further , That of the amounts provided herein, funds may be used for high-priority projects which shall be carried out by the Youth Conservation Corps, as authorized by 16 U.S.C. 1706: Provided further , That in accordance with section 4009(c) of Public Law 114–322 and as recommended by the Secretary in a letter dated February 13, 2019, funding provided for such purpose in fiscal year 2018 shall be made available to the Expanding Recycled Water Delivery Project (VenturaWaterPure), the Pure Water Monterey-Groundwater Replenishment Project, the Groundwater Reliability Improvement Program (GRIP) Recycled Water Project, the North Valley Regional Recycled Water Program, the South Sacramento County Agriculture and Habitat Lands Recycled Water Program, and the Central Coast Blue Project: Provided further , That in accordance with section 4007 of Public Law 114–322 and as recommended by the Secretary in a letter dated February 13, 2019, funding provided for such purpose in fiscal years 2017 and 2018 shall be made available to the Cle Elum Pool Raise, the Boise River Basin Feasibility Study, the Del Puerto Water District, the Los Vaqueros Reservoir Phase 2 Expansion Project, the North-of-the-Delta Off stream storage (Sites