10.—(1) In the case of the production of seed of a hybrid variety of maize—
(a)sufficient pollen shall be shed by the plants of the male component while the plants of the female component are in flower;
(b)where appropriate emasculation shall be carried out; and
(c)where 5% or more of the female component plants have receptive stigmas, the percentage of female component plants which have shed pollen or are shedding pollen shall not exceed—
(i)1% at an official UK field inspection or a UK field inspection carried out under official supervision, and
(ii)2% at the total of the official UK field inspections or UK field inspections carried out under official supervision.
(2) For the purposes of sub-paragraph (1)(a) and (c) plants shall be considered as having shed pollen or to be shedding pollen where, on 50 mm or more of the central axis or laterals of a panicle, the anthers have emerged from their glumes and have shed or are shedding pollen.