Scale intervals
15.—(1) The graduated weight indicating, printing and tare devices of any non-automatic weighing machine first passed as fit for use for trade on or after 1st August 1991 shall—
(a)have scale intervals in the following form—
1 × 10n, 2 × 10n, or 5 × 10n, the index n being a positive or a negative whole number or zero; and
(b)subject to paragraph (2), give weighing results which comply with the principle of reading by simple juxtaposition.
(2) The requirements of paragraph (1)(b) shall not apply—
(a)to semi-self indicating machines, made in accordance with an approved pattern, having mechanical weight indicating devices with a range of self indication of 500 g; or
(b)to that part of any weighing result which is obtained by adding the values of weights or poises.