43 C.F.R. § 3213.21 When will my lease expire?
Title 43 - Public Lands: Interior
Your lease expires at the end of its primary term or extended term if you do not either begin production before the primary term ends or extend your lease under subpart 3208. BLM will not notify you when your lease expires at the end of the primary term.
Title 43: Public Lands: Interior
PART 3200—GEOTHERMAL RESOURCE LEASING
Subpart 3213—Relinquishment, Termination, Cancellation, and Expiration
§ 3213.21 When will my lease expire?