4. A distributor may only sell raw cows' milk intended for direct human consumption —
(a)which he or she has bought pursuant to sub-paragraph (b)(iii) of paragraph 3;
(b)in the containers in which he or she receives the milk, with the fastenings of the containers unbroken;
(c)from a vehicle which is lawfully used as a shop premises; and
(d)direct to the ultimate consumer.