The overall requirements of an s.s.e.p., especially concerning audibility and intelligibility, are contained within ISO 7240-19. In addition to ensuring compliance with ISO 7240-16:2007, the manufacturer should also consider the requirements of ISO 7240-19, national regulations, codes and standards that affect the s.s.c.i.e. design and usability. For example, some regulations require certain optional functions to be available on all s.s.c.i.e. installed within the jurisdiction.
The use of the equipment for normal sound reinforcement and distribution systems purposes under non-hazardous circumstances is not excluded.
ISO 7240-16:2007 can also be used for the assessment of similar control and indicating equipment for use in systems where the warning-signal broadcast does not include a voice message.
ISO 7240-16:2007 does not apply to systems using only sounders or bells.