43 CFR § 3602.22
When will a contract terminate?
June 11, 2020
(a) Your contract terminates when—
(1) Its term expires;
(2) You have completed production under your contract or permit and any renewal, and completed required reclamation; or
(3) BLM cancels your contract under §3601.60 et seq. of this part.
(b) You and BLM may, by agreement, terminate the sales contract at any time.