N.Y. Comp. Codes R. & Regs. tit. 15, § 76.15
(b) Unless otherwise specifically authorized by this Part, no person, including the owner, operator, partner or any officer, manager, employee or associate of the licensee, shall give instruction for hire in the operation of motor vehicles unless such person is the holder of a current instructor's certificate issued for such purpose by the commissioner. Such certificate is to be valid for use only in connection with the business of the drivers' school listed thereon. An original instructor's certificate may only be issued to a person who can comply with all of the following qualifications:
(8) an instructor must be at least 21 years of age in order to be the supervising driver giving behind-the-wheel instruction where the student driver is the holder of a learner permit.
(c) Application.
(1) Applications for an instructor's certificate must be made by the person desiring such certificate on forms prescribed by the commissioner and must have endorsed thereon the consent of a licensed drivers' school desiring to employ the applicant. Any applicant for an original driving instructor's certificate must successfully complete a course in driver training and traffic safety, approved by the commissioner, consisting of at least 30 hours, prior to the expiration date of the original certificate issued, except that if the original certificate when issued will expire in less than six months, such course must be completed prior to the expiration date of the first renewal certificate issued. The completion of such course in driver training and traffic safety shall not be required if the holder of a current and valid certification by the Education Department is qualified to give driver education and training instruction in the secondary or higher schools of New York, nor shall such course in driver training and safety be required of the holder of a valid certificate of training issued by the Motorcycle Safety Foundation, or other evidence of motorcycle teacher training approved by the commissioner in order to be engaged in teaching motorcycle operation; and except that where the course is not available within a reasonable distance from the drivers' school, the commissioner may renew the certificate upon the condition that the applicant complete the first available course, but in no event shall such certificate be renewed without such course more than two times.
(d) An applicant for an original instructor's certificate will be required to submit to and pass special eye, written, road sign and road tests which will include a demonstration of ability to instruct, and may be required to submit additional or other proof of his qualifications as an instructor. The written, road sign and road tests, as established by the commissioner, may be given by a motor vehicle employee or a driving instructor approved by the department to give these tests pursuant to paragraph (b)(7) of this section. The vision test must be conducted by a health care professional listed in section 5.2(d) of this Title. The applicant will be permitted two chances to qualify on each of the tests required on an application except for the road test. A failure on the road test will void the application.
(f) An instructor's certificate must be surrendered by the instructor to the drivers' school employer who shall surrender it to the proper drivers' school unit in the central office of the Department of Motor Vehicles, Albany, New York, immediately upon termination of an instructor's services with or by any drivers' school designated on such certificate.
(l) Qualified and recognized experts in the field of driver training, traffic regulation or motor vehicles may give occasional classroom lectures (not including the pre-licensing course lectures) without holding a valid instructor's certificate. The school shall maintain a record, indicating the name, address, qualifications of the extent and lecture date, and shall make all such records available for inspection by the commissioner if he desires to inspect them.
(m) Denials of instructor's certificate.