43 CFR § 3833.91
What defects cannot be cured under this part?
June 11, 2020
Defects or other problems that cannot be cured and therefore result in forfeiture of your mining claims or sites are:
(a) Failing to record a mining claim or site within 90 days after you locate it;
(b) Failing to pay the location fee or initial maintenance fee within 90 days after you locate it; and
(c) Locating a mining claim or site on lands withdrawn from mineral entry at the time you locate it.