§ 505. “Mineral leasing laws” defined

As used in this chapter “mineral leasing laws” shall mean the Act of October 20, 1914 ( 38 Stat. 741 ); the Act of February 25, 1920 ( 41 Stat. 437 ) [ 30 U.S.C. 181 et seq.]; the Act of April 17, 1926 ( 44 Stat. 301 ) [ 30 U.S.C. 271 et seq.]; the Act of February 7, 1927 ( 44 Stat. 1057 ) [ 30 U.S.C. 281 et seq.] and all Acts heretofore or hereafter enacted which are amendatory of or supplementary to any of the foregoing Acts.