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 any instrument other than an instrument of accuracy classification Class I or Class II in any transaction relating—
(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.
(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 to the NAWI 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—
(a)any of the materials to which the expression “ballast” applies in Schedule 4 to the 1985 Act;
(b)any material the disposal of which constitutes a landfill disposal as defined in paragraph (2) of section 70 of the Finance Act 1996(1), whether or not the disposal amounts to a taxable disposal as defined in section 40 of that Act; or
(c)household, industrial or commercial waste.
(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.
(7) For the purposes of this regulation, the terms “household waste”, “industrial waste” and “commercial waste” shall be construed in accordance with section 75 of the Environmental Protection Act 1990(2), provided that “waste” shall include any waste disposed of for reprocessing or recycling purposes but shall not include any radioactive waste as defined in section 2 of the Radioactive Substances Act 1993(3).
29. Where an instrument is fitted with one or more level-indicating devices, a person shall not use the instrument for trade unless each such device indicates that it has been set to its reference position.
30. Where an instrument is marked with a temperature range, a person shall not use the instrument for trade at temperatures outside that range.
31. Where an instrument is marked with the manner of use, a person shall not use the instrument for trade in a manner which does not accord with the marking.
32. Where an instrument is fitted with a weight or any other printing device, a person shall not use the instrument for trade unless it is so erected and used that the printing device, when used, produces a legible and durable printout.
33.—(1) A person shall not use any instrument for trade unless it is erected and used in such a manner that, during a weighing operation, the load being weighed is stationary relative to the load receptor and supported only by the load receptor.
(2) A person shall not use for trade an instrument for the purpose of sales by retail—
(a)unless—
(i)the load receptor is not less than 10 mm above any adjacent surface; or
(ii)where the load receptor is less than 10 mm above any adjacent surface, the boundary of the top surface of all adjacent surfaces is durably marked in a distinctive and contrasting manner with a band at least 15 mm in width; or
(b)if the load receptor is below the level of any adjacent surface.
34. Except as specified in the EC type-approval certificate, a person shall not use an instrument for trade unless it is erected in such a manner that the operator can, notwithstanding the nature of the instrument or its surroundings, readily take up a single position from which he can—
(a)see directly or with the aid of mirrors, closed-circuit television or other permanently installed facilities, the whole of the unladen load receptor;
(b)operate the instrument’s controls; and
(c)obtain a weight reading from the instrument.
35.—(1) Subject to paragraph (2) below, a person shall not use for trade a Class I or Class II instrument which is used in association with any weight or weights to determine the value of any load in terms of metric units of mass other than carat (metric) units, save in association with weights which bear the mark of EEC initial verification in accordance with—
(a)the provisions of—
(i)in the case of Class II instruments, Council Directive 74/148/EEC on above-medium accuracy weights(4); or
(ii)in the case of Class I instruments, the said Directive except for those provisions relating to weights of Class F2 or Class M1; and
(b)the provisions of paragraph 5 of Schedule 1 to the Measuring Instruments (EEC Requirements) Regulations 1988(5).
(2) The requirements of this regulation shall not apply to any instrument for use for trade in any transaction in drugs or other pharmaceutical products before 1st January 2003.
36. No person shall use for trade an instrument having weight scale intervals expressed in decimal parts of a pound save by way only of a supplementary indication of the weight of the goods.
37.—(1) Subject to paragraph (2) below, a person shall not use an instrument for trade unless it is properly balanced or set to zero immediately prior to use.
(2) Paragraph (1) above shall not apply in the case of an instrument of an approved type if, in the EC type-approval certificate, it is described as not being so constructed as to balance when unloaded.