43 CFR § 3202.10
Who may hold a geothermal lease?
June 11, 2020
You may hold a geothermal lease if you are:
(a) A United States citizen who is at least 18 years old;
(b) An association of United States citizens, including a partnership;
(c) A corporation organized under the laws of the United States, any state or the District of Columbia; or
(d) A domestic governmental unit.