The board of supervisors of any drainage district, whenever it is determined by the board that it is for the best interests of the district, may enter into a contract with the United States for the reclamation by drainage or irrigation of the lands within the boundaries of the district, under the provisions of the Act of Congress of June 17, 1902 (32 Stat. 388), and Acts amendatory thereof and supplementary thereto, and especially the Act of Congress approved August 13, 1914, entitled, ‘An act extending the period of payment under reclamation projects, and for other purposes,’ commonly known as the ‘Twenty-Year Extension Act.’