In order to assure continuous operation of all projects and project facilities governed by the Federal reclamation law (Act of June 17, 1902, 32 Stat. 388, and Acts amendatory thereof or supplementary thereto), including any project and facilities constructed with funds provided by the Small Reclamation Projects Act (Act of August 6, 1956, 70 Stat. 1044, and Acts amendatory thereof or supplementary thereto) (43 U.S.C. 422a et seq.) or with funds provided by the Distribution System Loans Act (Act of May 14, 1956, 69 Stat. 244, and Acts amendatory thereof or supplementary thereto), there is hereby authorized to be appropriated from the reclamation fund an emergency fund which shall be available for defraying expenses which the Commissioner of Reclamation determines are required to be incurred because of unusual or emergency conditions