18Certificates of verification of State primary standards of measurement

#### 18 Certificates of verification of State primary standards of measurement (1) When a State primary standard of measurement is verified, a certificate of verification must be issued to the appropriate State authority. (2) The certificate of verification of a State primary standard of measurement must state: (a) that it verifies the State primary standard of measurement in an appropriate manner, having regard to the nature of the standard of measurement; and (b) the date of verification; and (c) the value ascertained for the standard on that date in terms of an Australian legal unit of measurement; and (d) the accuracy with which the standard is verified; and (e) the value (stating the uncertainty) of any relevant environmental or other influence factors, like temperature and pressure, at the time of the verification; and (f) a description of any mark on, or attached to, the standard under these regulations; and (g) the period, from the date of verification, for which the certificate is given. (4) For paragraph (2)(d), the accuracy of a State primary standard of measurement must be ascertained in a manner determined in writing by the Chief Metrologist. (5) For paragraph (2)(d), the accuracy with which a State primary standard of measurement must be verified must be expressed as an uncertainty that does not exceed: (a) for a standard for the measurement of length of a denomination stated in column 1 in Schedule 4—the maximum permissible uncertainty stated for the denomination in column 2 in that Schedule; or (b) for a standard for the measurement of mass of a denomination stated in column 1 in Schedule 5—the maximum permissible uncertainty stated for the denomination in column 2 in that Schedule; or (c) for a standard for the measurement of mass of a denomination not stated in column 1 in Schedule 5—the maximum permissible uncertainty appropriate to that denomination when linear interpolation is applied to the maximum permissible uncertainty stated for the denominations in column 2 in that Schedule.