43 C.F.R. § 3581.4-1 Lease terms.
Title 43 - Public Lands: Interior
The lease shall be issued for a period of 20 years with a preference right in the lessee to renew for a 10-year term at the end of the initial term and at the end of each 10-year period thereafter. [51 FR 15213, Apr. 22, 1986; 51 FR 25204, July 11, 1986]
Title 43: Public Lands: Interior
PART 3580—SPECIAL LEASING AREAS
Subpart 3581—Gold, Silver, or Quicksilver in Confirmed Private Land Grants
§ 3581.4-1 Lease terms.

