(a) In all new installations, manual alarm boxes shall be clearly and permanently marked ``IN CASE OF FIRE BREAK GLASS.'' Existing boxes not so marked with the same or equivalent wording, shall be identified either on the box or adjacent bulkhead in at least \1/2\ inch letters ``IN CASE OF FIRE BREAK GLASS.'' All manual alarm boxes shall be numbered in red on the adjacent bulkhead with at least \1/2\ inch figures. The number shall agree with the number of the zone.
(b) [Reserved]