21. In these Regulations “EC officially certified basic seed of a component of a listed hybrid variety” means —
(a)basic seed of a component of a listed hybrid variety officially certified as basic seed by or on behalf of the competent seed certification authority in another member State, and
(b)basic seed of a component of a previously listed hybrid variety officially certified as basic seed by or on behalf of the competent seed certification authority in another member State and for which a marketing extension is in force in respect of seed of the hybrid variety.