1 The Administration, another Contracting Government
at the request of the Administration or an organization recognized
by the Administration shall periodically verify the proper functioning
of the ship's safety-management system.
2 A ship required to hold a certificate issued
pursuant to the provisions of regulation
4.3 shall be subject to control in accordance with the provisions
of regulation XI/4. For this purpose
such certificates shall be treated as a certificate issued under regulation I/12 or I/13.