N.Y. Multiple Residence Law § 12

§ 12. Uncompleted dwellings. 1. The provisions of this chapter\nrelating to new multiple dwellings shall not apply to any multiple\ndwelling for which plans were on file with the department or a permit to\ncommence building was issued by the department before July first,\nnineteen hundred fifty-two, or to any dwelling the plans for conversion\nof which to multiple dwelling occupancy, were on file with the\ndepartment or a permit authorizing the commencement of the work of such\nconversion was issued by the department before such date, provided,\nhowever, a certificate of occupancy as required by the provisions of\nsection three hundred two shall be obtained therefor prior to July\nfirst, nineteen hundred fifty-seven.\n 2. No provisions of any part of this section shall be deemed to\nprohibit the amendment of any plans filed and approved before July\nfirst, nineteen hundred fifty-two, if such amendment would have been\nlawful before such date, or if such amendment complies with the\nrequirements of this chapter for alterations to buildings of like kind\nexisting before such date.\n