3.—(1) Under rated operating conditions, the error of measurement shall not exceed the maximum permissible error (MPE) value set out in paragraph 14.
(2) Unless stated otherwise, MPE is expressed as a bilateral value of the deviation from the true measurement value.
(3) The manufacturer shall specify the climatic environment in which the material measure of length is intended to be used and other influence quantities likely to affect its accuracy, taking account of the requirements laid down in this Schedule.