Section, Pub. L. 90-57, July 28, 1967, 81 Stat. 130, authorized payment from contingent fund of Senate of charges for long distance telephone calls by Senators. See section 58 of this title

Section 506(k), formerly Sec. 506(h), of Pub. L. 92-607, renumbered Sec. 506(i) by Pub. L. 95-391, title I, Sec. 108(a), Sept. 30, 1978, 92 Stat. 773, renumbered Sec. 506(j) by Pub. L. 96-304 title I, Sec. 101, July 8, 1980, 94 Stat. 889, and renumbered Sec. 506(k) by Pub. L. 97-276, Sec. 101(e), Oct. 2, 1982, 96 Stat. 1189, provided that the repeal is effective Jan. 1, 1973