Requirements for use for trade
No person shall use for trade a material measure of length unless—
(a) it is compliant with the essential requirements other than the provisions relating to limits of maximum permissible errors;
(b) it operates within twice the limits of maximum permissible error referred to in the essential requirements; and
(c) the requirements of paragraph 39 are complied with.
Manner of use
(1) Where a material measure of length is marked with a temperature range, it must not be used for trade in temperatures outside that range.
(2) Where a measure bears an inscription which signifies the manner and purpose of use, it must not be used for trade in a manner or for a purpose which does not accord with that inscription.
(3) No person shall use a material measure of length for trade in such manner as to expose it to environmental or other influences which may adversely affect its accuracy or function