New York Consolidated Laws, Labor Law - LAB § 917. Continuing obligations

(a) Every individual who is required to be licensed, registered or certified according to law and who is a worksite employee shall be deemed an employee of the client for purposes of any license, registration or certification requirement.

(b) A professional employer organization shall not be deemed to be engaged in an occupation, trade or profession that is subject to licensing, registration or certification requirements, or is otherwise regulated by a governmental entity solely by entering into a professional employer agreement with a client or an employment relationship with worksite employees.