7 U.S.C. § 1611 — Illegal sales of uncertified seed

It shall be unlawful in the United States^* or in interstate or foreign commerce^* to sell or offer for sale or advertise, by variety^* name, seed not certified by an official seed certifying agency^*, when it is a variety for which a certificate of plant variety protection under the Plant Variety Protection Act [7 U.S.C. 2321 et seq.] specifies sale only as a class of certified seed: Provided, That seed from a certified lot may be labeled as to variety name when used in a mixture by, or with the approval of, the owners of the variety.