New York Consolidated Laws, General Business Law - GBS § 401. License required

1. No person shall engage in the practice of nail specialty, waxing, natural hair styling, esthetics or cosmetology, as defined in section four hundred of this article, without having received a license to engage in such practice in the manner prescribed in this article. No person shall act as a trainee or perform any service as such unless he or she has obtained a certificate of registration pursuant to this article.

2. No person shall own, control or operate, whether as a sole proprietor, partner, shareholder, officer, independent contractor or other person, an appearance enhancement business without having received a license for such business in the manner provided in this article.

3. A person licensed by any other state or country to practice nail specialty, waxing, natural hair styling, esthetics or cosmetology shall be allowed to practice in New York state for three months or less within any calendar year for the purpose of giving to, or receiving from, persons who are licensed under this article training in current styles, techniques or materials, provided however, that no such unlicensed person may provide services to the public for any fee, or other compensation, whether direct or indirect.