(Amended by Ordinance Nos. 176381, 180330 and 189711, effective September 25, 2019.) Smoke detectors sensing visible or invisible particles of combustions or alarms shall be required in all buildings where a room or area therein is designated for sleeping purposes either as a primary use or use on a casual basis. Smoke detectors or alarms shall be installed in each sleeping room or area, in the immediate vicinity of the sleeping rooms and on each additional story of the dwelling, including basements and attics with habitable space. All detectors or alarms shall be approved, shall be installed in accordance with the manufacturer’s instructions, shall plainly identify the testing agency that inspected or approved the device, and shall be operable.