N.Y. Gen. Bus. Law § 446

§ 446. Application of article. 1. This article shall not apply to or\naffect the practice of their professions by duly licensed physicians,\nosteopaths, dentists, optometrists, nurses or physiotherapists, or to\nthe practice of their vocations by hairdressers or cosmetologists, nor\nto any hospital which operates a barber shop solely for the convenience\nof its patients and which is not open to the public.\n 2. This article shall not be construed to apply to, affect or prevent\nthe practice of beauty culture as now conducted in the beauty shops of\nthe state, or the operation of beauty shops and barber schools.\n 3. The provisions of this section shall not be construed to furnish a\nmeans of evading the provisions of this article relating to the practice\nof barbering and in any prosecution for a violation of any such\nprovision, the terms "hairdresser, " "cosmetologist, " "beauty shop,"\nand "practice of hairdressing and cosmetology" shall have their commonly\naccepted meanings.\n