(1) An inspector who, upon examination under section 21, finds any weight or measure or measuring instrument to be correct, and otherwise in all respects to comply with this Act and any regulations made under this Act, shall stamp such weight, measure or instrument in the prescribed manner with the prescribed mark of verification.
(2) An inspector shall not stamp with a mark of verification any weight or measure or weighing or measuring instrument which is not correct or which does not comply with this Act or any regulation which is applicable in the case of such weight, measure or instrument, as the case may be.
(3) An inspector shall not stamp any weight or measure with a mark of verification—
(a) unless such weight or measure is of an authorised denomination; and
(b) unless he or she has tested it by comparison with a working standard of that weight or measure.