§ 31.
(a)
Establishment of office; appointment and duties; examination of geological structure, mineral resources, and products of national domain; prohibitions in respect to lands and surveys
([Mar. 3, 1879, ch. 182], [20 Stat. 394]; [Pub. L. 87–626], §§ 1, 2, Sept. 5, 1962, [76 Stat. 427]; [Pub. L. 93–608, § 2(6)], Jan. 2, 1975, [88 Stat. 1971]; [Pub. L. 102–154, title I], Nov. 13, 1991, [105 Stat. 1000]; [Pub. L. 104–66, title I, § 1081(e)], Dec. 21, 1995, [109 Stat. 721].)