* Act of June 30, 1932 (P.L. 72-229, Ch. 331, 47 Stat. 473; 16 U.S.C. 557a)

The Secretary of Agriculture is authorized in connection with the administration of the National Forests to enter into contracts for the procurement of services, materials and supplies for the ensuing fiscal year, prior to the passage of an appropriation therefore: Provided, That such contract shall aliquot the cost for such service by fiscal years and shall not be binding on the United States as to that part for the ensuing year unless and until an appropriation applicable to the payment thereof is made: And provid-ed further, That all such contracts shall by their terms provide that the obligation of the United States is contingent upon the passage of an applicable appro-priation and that no payment there-under will be made until such ap-propriation becomes available for expenditure. (16U.S.C. 557a)