N.Y. Comp. Codes R. & Regs. tit. 9, § 4006.7 – Safety helmet required.

(a) Every person working in the gate crew or mounted on horseback on the grounds of a racetrack shall wear a properly fastened safety helmet. The gate crew means the starter and assistant starter and any person who handles a horse for the starter or assistant starter at the starting gate.
(b) Each safety helmet shall provide a minimum level of shock absorbing protection to the head as evidenced by a label indicating compliance with one or more of the following product standards or with a standard that in the judgment of the executive director of the commission or his or her designee is comparable or superior:
1. (1) American Society for Testing and Materials, ASTM F1163-04a or F1163-15, Standard Specification for Protective Headgear Used in Horse Sports and Horseback Riding;
2. (2) European Norm, EN 1384:1996, Helmets for Equestrian Activities;
3. (3) British Standards Institute Product Approval Specification, PAS 015:2011, Specification for Helmets for Equestrian Activities;
4. (4) Interim European Standard, VG1 01.040: 2014-12 (with or without BSI Kitemark), Equestrian helmets;
5. (5) Australian Standards/New Zealand Standards, AS/NZS 3838:2006, Helmets for horse riding and horse-related activities;
6. (6) Australian Racing Board Helmet Safety Standard, ARB HS 2012;
7. (7) Snell Memorial Foundation (Snell) Equestrian Helmet Standard E2001 or E2016; or
8. (8) L'Union Technique de l'Automobile du Motocycle et du Cycle (UTAC) or CRITT Sport Loisirs (CRITT) 04/2015 standards.
(c) A safety helmet shall not be altered from its original manufactured design nor shall the product marking be removed or defaced.