# The Weights and Measures (Packaged Goods) Regulations (Northern Ireland) 2011, Regulation 4: Duty to comply with the three packers’ rules

Extent: N.I.

(1) It shall be the duty of the packer or importer of packages to ensure that they are made up in such a way as to satisfy the following rules—
(a) the contents of the packages shall be not less on average than the nominal quantity;
(b) the proportion of packages having a negative error greater than the tolerable negative error shall be sufficiently small for batches of packages to satisfy the requirements specified in Schedule 2;
(c) a package shall not have a negative error greater than twice the tolerable negative error.
(2) Compliance with the rules in paragraphs (1)(a) and (b) shall be determined by the reference test.

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Source: https://www.legislation.gov.uk/nisr/2011/331/regulation/4 (the official version)
Page: https://openlegislation.uk/weights-and-measures-packaged-goods-regulations-northern-ireland-2011/regulation-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.