The Sacred Buffalo Vision by Robert J. Juneau and Robert C. Juneau pg.167

The identity of many hundreds of thousands of Indian claimants nationwide is unknown since they are the undetermined heirs of deceased Indian allottees. The Indian claimants were not told of the decision by Interior officials not to litigate or to submit legislative proposals to Congress were made. Interior officials threw out all categories of claims including secretarial transfers, unapproved rights of way, forced fee patents, old age assistance, while other identified claims such as welfare assistance, water rights, pollution of Indian allotments and loss of mineral rights claims were not even mentioned by the Interior officials.

Secretary of the Interior James Watt notified Congress that the Interior and Justice Departments opposed any further extensions of the statute of limitations, and firmly believe that the 2415 Indian Claims Program will be adequately completed by December 31, 1982. This view was not accepted by members of Congress who submitted legislation to extend the statute of limitations once again.
-The Sacred Buffalo Vision by Robert J. Juneau and Robert C. Juneau  
pg.167