A.    Smoke detectors shall be required in certain structures:

    Every dwelling unit, dwelling, apartment house or lodging house shall contain an approved and properly functioning smoke detector installed in accordance with Section 8.16.030.

    B.    The owner of each dwelling unit, dwelling, apartment house or lodging house shall install smoke detectors as required by this chapter within ninety days from the effective date of the ordinance codified in this chapter. (Prior code § 8-29)