47 U.S.C. § 399Section
§ 399. Support of political candidates prohibited
No noncommercial educational broadcasting station may support or oppose any candidate for political office.
(June 19, 1934, ch. 652, title III, §399, as added Pub. L. 90–129, title II, §201(8), Nov. 7, 1967, 81 Stat. 368; amended Pub. L. 93–84, §2, Aug. 6, 1973, 87 Stat. 219; Pub. L. 94–309, §7, June 5, 1976, 90 Stat. 685; Pub. L. 97–35, title XII, §1229, Aug. 13, 1981, 95 Stat. 730; Pub. L. 100–626, §10, Nov. 7, 1988, 102 Stat. 3211.)