18. Regulations 12, 13, 14 and 17 do not apply to a sale by retail of less than 50 kilograms of seed potatoes—
(a)in circumstances where at the time of sale there is displayed conspicuously on a label affixed to a package containing the seed potatoes or on a document or notice placed in close proximity to the seed potatoes a statement of the particulars specified in Schedule 7; or
(b)in containers that have not been previously used for any purpose, upon each of which has been printed or otherwise legibly and indelibly marked the particulars specified in Schedule 7, or attached to or inserted in each of which is a label marked with those particulars.