30 U.S.C. § 181

Deposits of coal, phosphate, sodium, potassium, oil, oil shale, gilsonite (including all vein-type solid hydrocarbons), or gas, and lands containing such deposits owned by the United States, including those in national forests, but excluding lands acquired under the Appalachian Forest Act, approved March 1, 1911 ( 36 Stat. 961 ), and those in incorporated cities, towns, and villages and in national parks and monuments, those acquired under other Acts subsequent to February 25, 1920 , and lands within the naval petroleum and oil-shale reserves, except as hereinafter provided, shall be subject to disposition in the form and manner provided by this chapter to citizens of the United States, or to associations of such citizens, or to any corporation organized under the laws of the United States, or of any State or Territory thereof, or in the case of coal, oil, oil shale, or gas, to municipalities. Citizens of another country, the laws, customs, or regulations of which deny similar or like privileges to citizens or corporations of this country, shall not by stock ownership, stock holding, or stock control, own any interest in any lease acquired under the provisions of this chapter. The term “oil” shall embrace all nongaseous hydrocarbon substances other than those substances leasable as coal, oil shale, or gilsonite (including all vein-type solid hydrocarbons). The term “combined hydrocarbon lease” shall refer to a lease issued in a special tar sand area pursuant to section 226 of this title after November 16, 1981 . The term “special tar sand area” means (1) an area designated by the Secretary of the Interior’s orders of November 20, 1980 (45 FR 76800–76801) and January 21, 1981 (46 FR 6077–6078) as containing substantial deposits of tar sand. The United States reserves the ownership of and the right to extract helium from all gas produced from lands leased or otherwise granted under the provisions of this chapter, under such rules and regulations as shall be prescribed by the Secretary of the Interior: Provided further , That in the extraction of helium from gas produced from such lands it shall be so extracted as to cause no substantial delay in the delivery of gas produced from the well to the purchaser thereof, and that extraction of helium from gas produced from such lands shall maintain the lease as if the extracted helium were oil and gas.