N.Y.C. Admin. Code § EBC D601: D601 Applicability.

Alterations, additions, repairs, and changes of occupancy of a multiple dwelling classified as HCA, HACA, HCB, and HACB, and conversion of a building originally erected before December 6, 1968, as a one- or two-family dwelling to a EBC-CDA, shall comply with the provisions of this code and the additional provisions in this Chapter.

D601.1 Dwellings erected after December 6, 1968.

This Chapter shall not apply to conversions of buildings originally erected on or after December 6, 1968, as one- or two-family dwellings. Such buildings shall be classified as HAEA (1968-2008) or HAEA (2008+), as applicable.

D601.2 Conversion to HAEA (MDL 9(3)).

Where multiple dwellings classified as HCA, HACA, HCB, and HACB are converted to HAEA (2008+), they shall comply with the provisions of Chapter D3 pursuant to Section D303, and the provisions of this Chapter shall not apply.