43 CFR § 3821.3
Requirement for filing statement of assessment work
June 11, 2020
The owner of an unpatented mining claim, mill site, or tunnel site located on O and C lands may either:
(a) Perform and record proof of annual assessment work if qualified as a small miner under part 3835 of this chapter; or
(b) Pay an annual maintenance fee of $100 per unpatented mining claim, mill site, or tunnel site under part 3834 of this chapter.
[68 FR 61064, Oct. 24, 2003]