Aug. 15, 1921, ch.64, 42 Stat. 159, codified in relevant part at 7 U.S.C. §§ 181-229, in particular, § 227
Section 406 of this Act (7 U.S.C. § 227) provides the Commission with jurisdiction over transactions in poultry products and margarine; and over retail sales of meat, meat food products, and livestock products in unmanufactured form. The Section also provides the Commission with jurisdiction over non-retail activities involving meat, meat food products, or livestock products in unmanufactured form, that are subject to the authority of the Secretary of Agriculture under this Act, in either of two instances: if the Secretary of Agriculture so requests, or, in certain circumstances, where the Commission needs to exercise such jurisdiction in order for it to exercise effective jurisdiction over retail sales of such products.