4.—(1) A person must not market any seed potatoes other than—
(a)pre-basic seed potatoes;
(b)basic seed potatoes;
(c)certified seed potatoes;
(d)scientific and selection seed potatoes; or
(e)test and trial seed potatoes.
(2) A person must not market any seed potatoes treated with a product which is produced primarily as an application for inhibiting germination.
(3) In this regulation, “scientific and selection seed potatoes” (“tatws hadyd gwyddonol a rhai i'w dethol”) means seed potatoes which—
(a)in relation to seed potatoes produced in Wales, are seed potatoes which have been authorised by the National Assembly for marketing in accordance with regulation 7; and
(b)in relation to seed potatoes produced outside Wales, are seed potatoes which have been authorised by the Certification Authority in the country or territory where the potatoes were produced for marketing in accordance with Article 6(1)(a) of the Directive.