Restrictions on use of instruments for trade
28.—(1) An instrument marked with a weighing range may be used for trade for determining the weight of any item by ascertaining the difference between two weights (both of which fall within the weighing range), that is to say, the weight of that item and another item or items and the weight of that other or those other items only.
(2) Save in accordance with paragraph (1) above, a person shall not use for trade an instrument marked with a weighing range for determining a weight outside that range in relation—
(a)to, or to articles made from, gold, silver or other precious metals, including gold or silver thread or fringe;
(b)to precious stones or pearls; or
(c)to drugs or other pharmaceutical products.
(3) A person shall not use for trade instrument other than an instrument of accuracy classification as Class I or Class II in any transaction—
(a)to, or to articles made from, gold, silver or other precious metals, including gold or silver thread or fringe;
(b)to previous stones or pearls.
(4) A person shall not use for trade an instrument carrying a marking in accordance with the EC type-approval certificate, or to which the restrictive use symbol referred to in paragraph 3 of Annex IV of the Directive applies, for a purpose which does not accord with the marking or the symbol.
(5) A person shall not use a Class IIII instrument for trade for any purpose other than for weighing any of the materials to which the expression “ballast” applies in Schedule 4 to the 1985 Act.
(6) A person shall not use for trade any instrument for the purpose of multiple weighing, that is to say, determining the mass of a load by totalling the results of more than one static weighing operation during each of which the load is only partially supported by the load receptor.