Pub. L. 93-638, tit. I, sec. 110
effect on existing rights
effect on existing rights Sec. 110. Nothing in this Act shall be construed as— (1) affecting, modifying, diminishing, or otherwise impairing the sovereign immunity from suit enjoyed by an Indian tribe; or (2) authorizing or requiring the termination of any existing trust responsibility of the United States with respect to the Indian people.