(1) Working standard linear measures provided pursuant to section 5(1) of the Act for use by inspectors shall be tested by comparison with a local standard of equivalent length being either a separate standard or a standard marked by divisions on a longer local standard which has been certified under section 4 of the Act as being so marked.
(2) Rigid working standard linear measures shall be tested within two years before use.
(3) Flexible working standard linear measures shall be tested within one year before use.
(4) Where an inspector has reasonable cause to believe that a working standard linear measure is not accurate within the relevant limit of error specified in Table 2 in Schedule 1 to these Regulations, he shall test it before use.
(5) Where such a comparison as is mentioned in paragraph (1) above reveals an error which exceeds the relevant limit of error specified in the said Table 2 and Regulation 3(2) below, the working standard shall not be further used until it has been so adjusted that any error is within that limit.