All plans and specifications for the construction of buildings and bridges in the National Zoological Park shall be prepared under the supervision of the Smithsonian Institution.
(Aug. 24, 1912, ch. 355, § 1, 37 Stat. 437; 1966 Reorg. Plan No. 4, eff. Aug. 23, 1966, 31 FR 11137, 80 Stat. 1611.)