42 U.S.C. § 3907
Section, Pub. L. 90–448, title IV, § 408, , 82 Stat. 516; Pub. L. 91–609, title III, § 303(c), , 84 Stat. 1780, which related to incontestability of guarantees was omitted pursuant to section 4528 of this title, which terminated authority to guarantee bonds, debentures, notes, or other obligations under this chapter after , with exceptions now inapplicable.