Certified seed only
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) Upon filing an application, or amendment thereto, specifying seed of the variety is to be sold by variety name only as a class of certified seed, the owner, or his or her designee, may label containers of seed of the variety substantially as follows: “Unauthorized Propagation Prohibited—U.S. Variety Protection Applied for Specifying That Seed of This Variety Is To Be Sold By Variety Name Only as a Class of Certified Seed.”
(b) An owner who has received a certificate specifying that a variety is to be sold by variety name only, as a class of certified seed, may label containers of the seed of the variety substantially as follows: “Unauthorized Propagation Prohibited—To Be Sold By Variety Name Only as a Class of Certified Seed—U.S. Protected Variety.”
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.