7 U.S. Code § 228b - Prompt payment for purchase of livestock
Each packer, market agency, or dealer purchasing livestock shall, before the close of the next business day following the purchase of livestock and transfer of possession thereof, deliver to the seller or his duly authorized representative the full amount of the purchase price:
Notwithstanding the provisions of subsection (a) of this section and subject to such terms and conditions as the Secretary may prescribe, the parties to the purchase and sale of livestock may expressly agree in writing, before such purchase or sale, to effect payment in a manner other than that required in subsection (a). Any such agreement shall be disclosed in the records of any market agency or dealer selling the livestock, and in the purchaser’s records and on the accounts or other documents issued by the purchaser relating to the transaction.
Any delay or attempt to delay by a market agency, dealer, or packer purchasing livestock, the collection of funds as herein provided, or otherwise for the purpose of or resulting in extending the normal period of payment for such livestock shall be considered an “unfair practice” in violation of this chapter. Nothing in this section shall be deemed to limit the meaning of the term “unfair practice” as used in this chapter.