If race officials determine that the numbers are not suitable, the numbers must be altered or replaced before the car may enter the race track. All numbers must appear neat and professional. Magnetic numbers are allowed, so long as they do not come off at speed. The driver's name, blood type, allergies, contact lens wearer and date of last tetanus injection must be displayed on the rear of the helmet. Labels of a temporary nature are not acceptable.
Plastic tape is acceptable.
All race drivers must wear a fire resistant suit of two or more layers. The suit must be made of Nomex or equivalent. One layer suits must be complemented with Nomex or equal underwear. Socks must also be of Nomex or equal. Goggles or a protective face shield must be worn in open cockpit cars and non-breakable eye protection or face shields must be worn in closed cars.