§ 61. Fire alarm system; watchman. 1. Except as provided in subdivision three, in every transient dwelling containing thirty or more sleeping rooms for transient occupancy, there shall be an interior fire alarm system.

2. Except as provided in subdivision three, in every fireproof transient dwelling containing fifty or more sleeping rooms for transient occupants, and in every non-fireproof transient dwelling containing thirty or more such rooms, when thirty-five per centum or more of such rooms are occupied, there shall be, in addition to the interior fire alarm system, one or more watchmen or clerks, employed by the owner, whose duty it shall be to visit every portion of the dwelling at frequent regular intervals between the hours of eleven p.m. and seven a.m. for the purpose of detecting fire or other sources of danger and giving immediate and timely warning thereof to all the occupants. There shall be provided a watchman's clock system or other device to record the movement of such watchman.

3. Where throughout such dwelling a fire-detecting system, or an approved type automatic sprinkler system is provided which actuates a fire alarm by the flow of water through such system so as to give warning to all the occupants of the dwelling, and is installed in a manner satisfactory to the department in conformity with rules and regulations adopted by the commission, the provisions of subdivisions one and two shall not be applicable.