25 U.S. Code § 321 - Rights-of-way for pipe lines
The Secretary of the Interior is authorized and empowered to grant a right-of-way in the nature of an easement for the construction, operation, and maintenance of pipe lines for the conveyance of oil and gas through any Indian reservation, through any lands held by an Indian tribe or nation in the former Indian Territory, through any lands reserved for an Indian agency or Indian school, or for other purpose in connection with the Indian Service, or through any lands which have been allotted in severalty to any individual Indian under any law or treaty, but which have not been conveyed to the allottee with full power of alienation upon the terms and conditions herein expressed. Before title to rights of way applied for hereunder shall vest, maps of definite location shall be filed with and approved by the Secretary of the Interior:
The “former Indian Territory”, referred to in text, was in the original “Indian Territory”, and has been designated as former Indian Territory by virtue of the admission of such former Territory and the Territory of Oklahoma to the Union as the State of Oklahoma, pursuant to act June 16, 1906, ch. 3335, 34 Stat. 267.
Enforcement functions of Secretary or other official in Department of the Interior relating to compliance with rights-of-way across Indian lands, issued under section 321 et seq. of this title with respect to pre-construction, construction, and initial operation of transportation system for Canadian and Alaskan natural gas transferred to Federal Inspector, Office of Federal Inspector for Alaska Natural Gas Transportation System, until first anniversary of date of initial operation of Alaska Natural Gas Transportation System, see Reorg. Plan No. 1 of 1979, §§ 102(e), 203(a), 44 F.R. 33663, 33666, 93 Stat. 1373, 1376, set out in the Appendix to Title 5, Government Organization and Employees, effective July 1, 1979, pursuant to Ex. Ord. No. 12142, § 1–101, June 21, 1979, 44 F.R. 36927, set out as a note under section 719e of Title 15, Commerce and Trade. Office of Federal Inspector for the Alaska Natural Gas Transportation System abolished and functions and authority vested in Inspector transferred to Secretary of Energy by section 3012(b) of Pub. L. 102–486, set out as an Abolition of Office of Federal Inspector note under section 719e of Title 15. Functions and authority vested in Secretary of Energy subsequently transferred to Federal Coordinator for Alaska Natural Gas Transportation Projects by section 720d(f) of Title 15.