All leases issued under 77-3-501 may be granted for a period not exceeding 20 years, and the lessee has a preferential right to renew the lease for an additional period not exceeding 20 years, subject to any terms and conditions the board imposes.
Duration Of Lease
Mont. Code Ann. § 77-3-508, under Underground Storage of Natural Gas.
Mont. Code Ann. § 77-3-508