Sch 6 para 39 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