The Cereal Seed (Wales) Regulations 2005

CS seed (maize and rye, and hybrids of barley, durum wheat, oats, self pollinating triticale, spelt wheat and wheat)

27.  In these Regulations in relation to maize and rye (including hybrids of maize and rye) and hybrids of barley, durum wheat, oats, self pollinating triticale, spelt wheat and wheat “CS seed” means seed that—

(a)has been produced directly from officially certified basic seed or, with the breeder’s written authority, from officially certified pre-basic seed, and

(b)is intended for purposes other than the production of cereal seed.