43 CFR § 3253.11
Must I notify BLM when I have completed my exploration operations?
June 11, 2020
After you complete exploration operations, send to BLM a complete and signed notice of completion of exploration operations, describing the exploration operations, well history, completion and abandonment procedures, and site reclamation measures. You must send this to BLM within 30 days after you:
(a) Complete any geophysical exploration operations;
(b) Complete the drilling of temperature gradient well(s) approved under your approved Notice of Intent to conduct exploration;
(c) Plug and abandon a temperature gradient well; and
(d) Plug shot holes and reclaim all exploration sites.