Part E4 Visibility in an emergency, exit signs and warning systems

If an exit is not readily apparent to persons occupying or visiting the building, then exit signs must be installed—

1. in appropriate positions in corridors, hallways, lobbies, foyers, auditoria, and the like, indicating the direction to a required exit; and
2. in a Class 9b building used as an entertainment venue — in any external egress path to a road where the exit does not open directly onto a road.