25 U.S.C. § 450n

Nothing in this subchapter 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.)

This part, consisting of sections 451 to 457 of this title, which was previously set out as part of former subchapter III of this chapter, was not enacted as part of the Indian Self-Determination and Education Assistance Act which comprises this subchapter.