53. In these Regulations, in relation to flax or linseed, “C3 seed” means seed that—
(a)has been produced directly from—
(i)officially certified basic seed;
(ii)officially certified C1 seed;
(iii)officially certified C2 seed; or
(iv)with the breeder’s written authority, from officially certified pre-basic seed, and
(b)is intended for purposes other than the production of oil and fibre plant seed.