(1) In these regulations:
(a) a reference to an appointment as a certifying, verifying or approving authority, or approval of the pattern of a measuring instrument, includes a reference to the appointment or approval as varied; and
(b) a reference to variation or cancellation of the appointment or approval includes a reference to variation or cancellation of the instrument of appointment or certificate of approval; and
(c) a reference to variation of the appointment or approval includes a reference to a variation of a condition of the appointment or approval by addition, omission or substitution.
(2) In these regulations, a reference to a certificate issued by a certifying, verifying or approving authority is a reference to a certificate of that kind that is signed:
(a) if the authority is a body corporate--by an officer or employee of the body authorised in writing by the body to sign and issue certificates of the same kind as the certificate; or
(b) if the authority is not a body corporate:
(i) by the authority; or
(ii) by a person authorised in writing by the authority in accordance with a permission given under regulation 71.