At least annually, the purchaser or permittee must furnish a record of the volume extracted, in cubic yards or weight equivalent, to the authorized officer. The units of measurement must correspond to the units used in the appraisal or estimate.
source: 39 FR 31317, Aug. 28, 1974, unless otherwise noted. Redesignated at 46 FR 36142, July 14, 1981.
cite as: 36 CFR 228.50