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.