Nothing in this chapter 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.
(Pub. L. 93–638, title I, § 111, formerly § 110, Jan. 4, 1975, 88 Stat. 2213; renumbered § 111, Pub. L. 100–472, title II, § 206(b), Oct. 5, 1988, 102 Stat. 2295.)