New York Consolidated Laws, Multiple Dwelling Law - MDW § 100. Application of article four

The provisions of this article shall apply to fireproof multiple dwellings erected after April eighteenth, nineteen hundred twenty-nine, and to such dwellings only.  They shall apply to all such fireproof dwellings unless their application is expressly limited to dwellings of a particular class.  They shall apply in addition to, and not in substitution for, the provisions of article three.