Starting in the 2025/2026 season:
- An orange LED light affixed to the rear of a driver’s helmet is mandatory. The light shall be a constant display, no flashing or strobe effect. Recommended fastening will be attaching to the goggle strap, or a separate elastic strap of similar dimensions. Helmets manufactured with a rear facing light will also be allowed. (Only displaying an orange solid LED display). Methods of installation that compromise the helmets structural integrity are not recommended. BITEHARDER Products sells ISR Approved Orange LED Helmet Lights. See them at www.biteharder.com/racing.
- In all classes RED LED Taillights must be illuminated whenever the snowmobile is on the racing surface, whether the engine is running or not. Taillight must be a minimum of 8 sq in. of continuous illuminated LED surface, or a production LED taillight. In addition, the sled must have an illuminated LED strip running across the left side of the tunnel, from the rear corner of the tunnel towards the front of the sled a minimum of 8” (inches) in length. Tail-light -side light failure during the race is not subject to disqualification.
The full rules can be found at isrracing.org