Instruments to be set to zero or to be balanced before use
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.