; 45(a)(2); 46) or any jurisdictional limitation of the Commission, the Commission shall also enforce this Act, in the same manner provided in paragraphs (1) and (2) of this paragraph, with respect to— (A) common carriers subject to the Acts to regulate commerce, air carriers, and foreign air carriers subject to part A of subtitle VII of title 49, and persons, partnerships, or corporations insofar as they are subject to the Packers and Stockyards Act, 1921 ( 7 U.S.C. 181 et seq.), except as provided in section 406(b) of such Act ( 7 U.S.C. 227(b) )