Add-on equipment which in every respect fulfils the provisions
                           of these Guidelines may be approved by the Administration for fitting
                           on board ships. The approval should take the form of a certificate
                           of type approval specifying the main particulars of the apparatus
                           and any limiting conditions on its usage necessary to ensure its proper
                           performance. Such certificate should be issued in the format shown
                           in part 3 of the annex.