The holder of any lease or permit issued under the provisions of sections 211 to 214 of this title shall have the right to use so much of the surface of unappropriated and unentered public lands not a part of his lease or permit, not exceeding eighty acres in area, as may be determined by the Secretary to be necessary or convenient for the extraction, treatment, and removal of the mineral deposits, but this provision shall not be applicable to national forest lands.
(Feb. 25, 1920, ch. 85, §12,
1960-
1948-Act June 3, 1948, increased lands to be used from 40 to 80 acres, excepted national forest lands from its provisions, and substituted "The holder of any lease issued under the provisions of sections 211 to 214 of this title", "public lands not a part of his lease", and "or convenient for the extraction" for "Any qualified applicant to whom the Secretary of the Interior may grant a lease to develop and extract phosphates, or phosphate rock, under the provisions of this chapter", "lands", and "for the proper prospecting for or development, extraction", respectively.