25 C.F.R. § 224.84
When may a Tribe grant a right-of-way?
A Tribe may grant a right-of-way under a TERA if the grant of right-of-way is over tribal land and the right-of-way serves:
(a) An electric production, generation, transmission, or distribution facility (including a facility that produces electricity from renewable energy resources) located on tribal land;
(b) A facility located on tribal land that processes or refines energy resources; or
(c) The purposes, or facilitates in carrying out the purposes, of any lease or agreement entered into for energy resources development on tribal land.