25 C.F.R. § 262.8
(a) Archaeological resources excavated or removed from Indian lands, except for human remains of Indians, funerary objects, sacred objects and objects of cultural patrimony, remain the property of the Indian tribe or individual(s) having rights of ownership over such lands. Ownership and right of control over the disposition of the excepted items shall be in accordance with the order of priority provided in the Native American Graves Protection and Repatriation Act (Pub. L. 101-601), adapted for the purpose of this rule as follows:
(2) In any case in which such lineal descendants cannot be ascertained, and in the case of sacred objects and objects of cultural patrimony:
(b) No permit for the excavation or removal of archaeological resources on Indian lands may be issued without the written consent of the Indian landowner(s) either to grant custody of the resources recovered (other than human remains of Indians, funerary objects, sacred objects or objects of cultural patrimony) to a curatorial facility that meets the requirements of 36 CFR part 79 or to allow the permittee a reasonable period of time to hold or have ready access to them at an appropriate location for study. The excepted remains and objects are covered under § 262.5(d) of this part which, in general, permits their excavation or removal only when the research objectives and provisions for recovery, recording, and analysis are scientifically appropriate. Written consent to custody by a curatorial facility may include terms and conditions regarding curation (e.g., cleaning, viewing, loaning, studying, etc.), provided these are consistent with 36 CFR part 79.