43 CFR 3833.91 - What defects cannot be cured under this part?
Defects or other problems that cannot be cured and therefore result in forfeiture of your mining claims or sites are:
(b) Failing to pay the location fee or initial maintenance fee within 90 days after you locate it; and
Title 43 published on 2013-10-01
no entries appear in the Federal Register after this date.