50a U.S. Code Rule - Mineral permits and leases
(a) Suspension during military service
A person holding a permit or lease on the public domain under the Federal mineral leasing laws who enters military service may suspend all operations under the permit or lease for the duration of military service and for 180 days thereafter. The term of the permit or lease shall not run during the period of suspension, nor shall any rental or royalties be charged against the permit or lease during the period of suspension.
In order to obtain the protection of this section, the permittee or lessee shall, within 180 days after entry into military service, notify the Secretary of the Interior by registered mail of the fact that military service has begun and of the desire to hold the claim under this section.
Source(Oct. 17, 1940, ch. 888, title V, § 505, as added Pub. L. 108–189, § 1,Dec. 19, 2003, 117 Stat. 2857.)