There may be used to pay indebtedness to the United States created by a reclamation contract, as the same may become due, the preliminary fund, construction fund, maintenance fund, guarantee fund or conservation and development fund, or any one or more of said funds, provided for by the Conservancy Act, of any contracting district within the provisions of Section 5 (B) [73-18-5 B NMSA 1978] of this act.