This Part applies if a reasonable ground exists:
(a) to cancel the verification of a standard of measurement; or
(b) to cancel the certification of a measuring instrument or reference material; or
(c) to vary the certification of a reference material, other than on application; or
(d) to vary or cancel the approval of the pattern of a measuring instrument, other than on application; or
(e) to withdraw the approval of the pattern of a measuring instrument; or
(f) to cancel a permission given under regulation 71; or
(g) to vary or cancel an appointment, other than on application.