25 CFR § 215.25
Other minerals and deep-lying lead and zinc minerals
February 24, 2021
Except as provided in §215.6(b), leases on Quapaw Indian lands, for mining minerals other than lead and zinc and for lead and zinc and associated minerals below the horizon of the rock stratum known as the Reed Springs Formation, shall be made pursuant to the provisions of part 212 of this subchapter.
[26 FR 1910, Mar. 4, 1961. Redesignated at 47 FR 13327, Mar. 30, 1982]