After October 30, 1992, each occupied room must include at least one battery-operated or hard-wired smoke detector in proper working condition. If the room is occupied by hearing-impaired persons, the smoke detector must have an alarm system designed for hearing-impaired persons, unless the smoke alarm is connected to a central alarm system that is monitored on a 24-hour basis, or otherwise meets industry standards. [57 FR 33850, July 30, 1992]
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