5.—(1) In the case of seed of a species to which paragraph (2) applies, the number of plants of the crop species which are recognisable as obviously not being true to the variety shall not exceed —
(a)one per 30 square metres for the production of basic seed, and
(b)one per 10 square metres for the production of CS seed.
(2) This paragraph applies to —
(a)all grasses except smooth stalked meadowgrass;
(b)Alsike clover;
(c)birdsfoot trefoil;
(d)fodder radish;
(e)lucerne;
(f)lupins;
(g)red clover;
(h)sainfoin;
(i)trefoil, black medick;
(j)vetches; and
(k)white clover.