a. There is a second means of exiting the building in the event of fire or other emergency.
b. The unit includes at least one battery-operated or hard-wired smoke detector, in proper working condition, on each occupied level of the unit. Smoke detectors are located, to the extent practicable, in a hallway adjacent to a bedroom.
c. If the unit is occupied by hearing-impaired persons, smoke detectors have an alarm system designed for hearing-impaired persons in each bedroom occupied by a hearing-impaired person.
d. The public areas are equipped with a sufficient number, but not less than one for each area, of battery-operated or hard-wired smoke detectors. Public areas include, but are not limited to, laundry rooms, hallways, stairwells, and other common areas.