§ 5148.
The Federal Government shall not be liable for any claim based upon the exercise or performance of or the failure to exercise or perform a discretionary function or duty on the part of a Federal agency or an employee of the Federal Government in carrying out the provisions of this chapter.
([Pub. L. 93–288, title III, § 305], formerly § 308, May 22, 1974, [88 Stat. 149]; renumbered § 305, [Pub. L. 100–707, title I, § 105(d)], Nov. 23, 1988, [102 Stat. 4691].)