14 U.S.C. § 569a
A prior section 570, act Aug. 4, 1949, ch. 393, 63 Stat. 542, related to designation of any Federal prison for execution of sentence, prior to repeal by act May 5, 1950, ch. 169, §§ 5, 14(v), 64 Stat. 145, 148, effective May 31, 1951.