33 U.S.C. § 498a

act June 10, 1930, ch. 441, § 1746 Stat. 552June 10, 1930Section, , , provided that, in the case of bridges authorized prior to , by Acts of Congress, where Congress has specifically reserved the right to regulate tolls, such bridges, with respect to regulation of all tolls, be subject to sections 491 to 494 and 495 to 498 of this title.