(1) This section applies if the Safety Director or a transport safety officer is satisfied that a person on whom an improvement notice has been served has complied with all the requirements of, or a requirement of, that notice.
(2) The Safety Director or a transport safety officer must serve a clearance certificate on the person to the effect that (as the case requires)—
(a) all of the requirements of the improvement notice have been complied with; or
(b) the specific requirement of the improvement notice has been complied with.
(3) The clearance certificate must be served as soon as practicable after the Safety Director or a transport safety officer is so satisfied.
(4) A requirement of the improvement notice to which the clearance certificate relates ceases to be operative on receipt by the person of that certificate.