Native American Grave Protection and Repatriation Act of 1990
NAGPRA requires all museums and institutions receiving federal funds to inventory their holdings of Native American human remains, funerary objects, sacred objects, and what are called "objects of cultural patrimony" in the collections that they control. They must establish, as best they can, whether their individual holdings have cultural affiliations, or, in the case of skeletons, lineal descendants in living Native American groups. If relationships are established, the institutions are required to notify the relevant Native American organization about the existence of the materials and offer to repatriate them. NAGPRA also protects all Native American graves and other cultural objects found within archaeological sites on federal and tribal land.