// CODE SNIPPET
233.6.3 Emergency Warning Systems
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A permanent audible and visual emergency warning system complying with 702 shall be provided in all public use and common use areas. Permanent or portable audible and visual emergency warning systems shall be installed on an as-needed basis at the request of an occupant with a disability in a minimum of 20% of all units in the building, but not less than one of each type or class of unit provided. If a permanent system is provided, the visual emergency warning system shall be arranged so the flashing light beam is visible in all rooms of the dwelling unit.