Section, acts Jan. 27, 1948, ch. 36, title X, § 1001, 62 Stat. 13; Apr. 5, 1952, ch. 159, § 1, 66 Stat. 43; 1977 Reorg. Plan No. 2, § 7(a)(1), 42 F.R. 62461, 91 Stat. 1637; 1978 Reorg. Plan No. 2, § 102, eff. Jan. 1, 1979, 43 F.R. 36037, 92 Stat. 3783, provided for loyalty check of personnel. Pub. L. 87–256, § 111(a)(2), Sept. 21, 1961, 75 Stat. 538, previously repealed this section insofar as it related to persons employed or assigned to duties under the Mutual Educational and Cultural Exchange Act of 1961.