Section, Pub. L. 87–195, pt. II, 525, formerly 503(e),
509 (b), as added Pub. L. 88–633, pt. II, 201(a), (d), Oct. 7, 1964, 78 Stat. 1011; amended Pub. L. 89–171, pt. II, 201(f), Sept. 6, 1965, 79 Stat. 657; renumbered 525 and amended Pub. L. 90–137, pt. II, 201(b)(3), (i)(2), Nov. 14, 1967, 81 Stat. 455, 457, provided for guaranties until June 30, 1968. See section
2764 of this title.