N.Y. Comp. Codes R. & Regs. tit. 9, § 458.2 – During special event.

(a) The special assistants to the person in charge shall be expected to take whatever measures are deemed necessary, in addition to those listed in this section, to insure the safety of participants, spectators or any other persons during the authorized snowmobile special event.
(b) Immediately prior to the start of the special event, at least two special assistants to the person in charge shall take stations whereby they are in the most suitable position to accomplish the following:
1. (1) warn traffic approaching special event;
2. (2) prevent spectators on other snow-traveling machines from getting too close to special event;
3. (3) give assistance in case of participant accident (unless an emergency vehicle is specifically assigned to this task) or other type of mishap;
4. (4) stay close to the majority of participants (during races); and
5. (5) summon medical aid or other type of assistance.