A dwelling which
(a) was erected before 4/18/1929, to be occupied by one or two families living independently of each other and subsequently occupied as a multiple dwelling, or
(b) is three stories or less in height erected after 4/18/1929, to be occupied by one or two families living independently of each other and subsequently occupied by not more than three families in all, with a maximum occupancy of two families on each floor in a two STORY building and one family on each floor in a three STORY building, in compliance with the provisions of article six of the MDL, including section 170-a of said article. A converted dwelling occupied as a class A multiple dwelling is a class A converted dwelling; every other converted dwelling is a class B converted dwelling.
See the List of Multiple Dwelling Classifications
