7 U.S.C. § 1636h: Federal preemption

In order to achieve the goals, purposes, and objectives of this chapter on a nationwide basis and to avoid potentially conflicting State laws that could impede the goals, purposes, or objectives of this chapter, no State or political subdivision of a State may impose a requirement that is in addition to, or inconsistent with, any requirement of this subchapter with respect to the submission or reporting of information, or the publication of such information, on the prices and quantities of livestock or livestock products.