6. No growing crop certificate may be issued containing a statement that seed potatoes are capable of being marketed as pre-basic seed potatoes of [F1GB] grade PB unless the authorised officer is satisfied that the immediately succeeding crop produced from the seed potatoes is not likely to contain—U.K.
(a)more than 0.01% by number of growing plants which deviate from variety and type or are a different variety; or
(b)more than 0.5% by number of growing plants which show symptoms of virus diseases where those symptoms are attributable to infection in the mother crop.
Textual Amendments
F1Word in Sch. 1 para. 6 substituted (31.12.2020) by The Animal Health, Plant Health, Seeds and Seed Potatoes (Amendment) (EU Exit) Regulations 2019 (S.I. 2019/809), regs. 1(b), 7(15)(b) (as amended by S.I. 2020/1388, regs. 1(2)(a), 21(4)(l)(ii)); 2020 c. 1, Sch. 5 para. 1(1)