Okla. Stat. tit. 2, § 2-8-36.2: Chemically treated seed to be sold separately - Marking

It shall be unlawful to distribute, sell, or offer for sale, for

other than seeding purposes, within the State of Oklahoma, any

barley, corn, cotton, oats, peanuts, rye, sorghums, soybeans, wheat,

or other seed, cereals, or grain that has been treated with a

fungicide, unless it is sold separately from untreated seed or

grain, and a certificate, affidavit, or tag accompanies the sale

stating that the grain, seed, or cereal has been chemically treated

and cannot be used for "food, feed, or oil purposes".