2.—(1) Unless pre-packed in a securely closed container and except when sold as a constituent of a mixture of two or more liquids, beer or cider shall be sold by retail—

(a)only in a quantity of ⅓ pint, ½ pint [F1, 2/3 pint] or a multiple of ½ pint; and

(b)subject to paragraph (2) below, where sold for consumption on the premises of the seller, only in a capacity measure of the quantity in question.

(2) Paragraph (1)(b) above shall not apply where—

(a)the quantity of the intoxicating liquor the subject of the sale is ascertained by means of measuring equipment stamped in accordance with regulation 16(2) of the Measuring Equipment (Intoxicating Liquor) Regulations 1983(1);

(b)the liquor in question is delivered directly from the measuring equipment into the container in which it is intended the buyer should receive it;

(c)the liquor in question is so delivered after the buyer has ordered it; and

(d)the measuring equipment (or that part of it from which the liquor is delivered) is installed in such a position that the delivery of the liquor into the container can readily be seen by customers in that part of the premises where the buyer ordered the liquor.