N.Y. Educ. Law § 907
The board of education or trustees of each school district and board of cooperative educational services, and the governing body of each private elementary, middle and secondary school, shall allow students to carry and use topical sunscreen products approved by the federal Food and Drug Administration for over-the-counter use for the purpose of avoiding overexposure to the sun and not for medical treatment of an injury or illness, with the written permission of the parent or guardian of the student. A record of such permission shall be maintained by the school. A student who is unable to physically apply sunscreen may be assisted by unlicensed personnel when directed to do so by the student, if permitted by a parent or guardian and authorized by the school.
N.Y. Educ. Law § 907