Within six months of the effective date of this article, each multiple
residence and rental duplex shall have at least one smoke alarm, system/direct-wired
or self-contained/single station, approved by the Underwriters'
Laboratories, Inc., Factory Mutual Testing Laboratories or a certified
laboratory of similar reputation as approved by the Building Inspector,
installed on the ceiling of each dwelling unit in such a location
that, once activated, said alarm will be clearly audible within each
sleeping room of said dwelling unit with the door of said sleeping
room closed.