9. In regulation 4 for paragraphs (1) to (4) there shall be substituted the following paragraphs—
“(1) Save in accordance with paragraph (2), 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.
(2) 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.
(3) A person shall not use for trade any instrument other than an instrument of accuracy classification as Class I or Class II in any transaction—
(a)in, or in articles made from, gold, silver or other precious metals, including gold or silver thread or fringe;
(b)in precious 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.”.