5. No supplier shall market any plant material unless—
(a)it is substantially free on visual inspection from any harmful organisms and diseases impairing quality which reduce its usefulness as plant material and in particular from the organisms and diseases listed in the Annex to Directive 93/48/EEC in respect of its genus or species;
(b)it is substantially free from any defects likely to impair its usefulness as plant material;
(c)it has adequate identity and purity relative to its genus or species and, except in the case of rootstocks which do not belong to a variety, variety; and
(d)it is in lots of sufficiently homogeneous composition and origin.