43 CFR § 3835.91
What if I fail to file annual FLPMA documents?
June 11, 2020
If you fail to file an annual FLPMA document by December 30, as required in §3835.31(d), you forfeit the affected mining claims or sites.
If you fail to file an annual FLPMA document by December 30, as required in §3835.31(d), you forfeit the affected mining claims or sites.