# Weights and Measures (Northern Ireland) Order 1981, Paragraph 2


(1) Goods to which this Part applies which are not pre-packed, other than liquid fertilisers, shall be sold only by quantity, being—
(a) quantity by net weight; or
(b) if the goods are sold in a container which does not exceed the permitted weight and the gross weight of the goods is not less than 25 kilograms, quantity either by net weight or by gross weight; or
(c) quantity by volume.
(2) Goods to which this Part applies shall be pre-packed only if the container is marked with an indication of quantity, being—
(a) in the case of liquid fertilisers, quantity by capacity measurement;
(b) in any other case, quantity by net weight or, if the container does not exceed the permitted weight and the gross weight of the goods is not less than 25 kilograms, quantity either by net weight or by gross weight.
(3) In this paragraph, “permitted weight” means a weight at the rate of 650 grams per 50 kilograms.
(4) There shall be exempted from all requirements of this paragraph any sale of goods with a view to their industrial use.

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Source: https://www.legislation.gov.uk/nisi/1981/231/schedule/6/part/III/paragraph/2 (the official version)
Page: https://openlegislation.uk/weights-and-measures-northern-ireland-order-1981/schedule-6/part-III/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.