Division 2.3 F1

The public address system shall be protected against unauthorised use and be clearly audible above the ambient noise in all spaces, prescribed by paragraph .2.2, and shall be provided with an override function controlled from one location on the navigation bridge and such other places on board as the Administration of the flag State deems necessary, so that all emergency messages will be broadcast if any loudspeaker in the spaces concerned has been switched off, its volume has been turned down or the public address system is used for other purposes.