N.Y. Multiple Dwelling Law § 51-a

§ 51-a. Peepholes. In every multiple dwelling the owner shall provide\nand maintain a peephole in the entrance door of each housing unit. Such\npeephole shall be located, as prescribed by the department, but shall be\nso located as to enable a person in such housing unit to view from the\ninside of the entrance door any person immediately outside of the\nentrance door to such housing unit. The provisions of this section shall\nnot apply to hotels or apartment hotels or to college or school\ndormitories.\n