NAGPRA stands for The Native American Graves Protection and Repatriation
Act. The following is taken from _CRM_ Volume 17 No. 6 1994: Archeology
and the Federal Government.
 
The Native American Graves Protection and Repatriation Act (P.L. 101-601;
104 Stat. 3048, 25 USC 3001 note.), signed into law on November 16, 1990,
requires Federal agencies and museums to inventory human remains and
associated funerary objects and to provide culturally affiliated tribes
with the inventory of collections. The Act requires repatriation, on
request, to the culturally affiliated tribes and establishes a grant
program within the Department of the Interior to assist tribes and Native
Hawaiian organizations in repatriation and to assist museums in preparing
the inventories and collections summaries. It also makes the sale or
purchase of Native American human remains, whether or not they derive
from Federal or Indian lands, illegal.