(a) Type of Helmet. All participants shall wear a protective head cover, undamaged and unaltered, which meets or exceeds the safety standards of the Consumer Product Safety Commission (CPSC), and which is clearly labeled by the manufacturer as satisfying such standards. Helmets manufactured prior to March 10, 1999 must meet or exceed the safety standards of (i) the American National Standard Institute (ANSI Z90.4), (ii) The Snell Memorial Foundation (Protective Headgear for Bicycle Users), or (iii) ASTM F1446 or F1447, and which is clearly labeled by the manufacturer as satisfying such standards. Removal of helmet cover, if required for that helmet to meet such safety standards, shall constitute an impermissible alteration in violation of this Section 5.9(a). Any violation of this Section 5.9(a) shall result in disqualification.

(b) Chin Strap Violations. The helmet must be fastened before the participant first mounts the bicycle, at all times when the participant is on the bicycle, and must not be unfastened until the participant has dismounted. Any violation of this Section 5.9(b) which occurs while the participant is in the transition area shall result in a variable time penalty. Any other violation of this Section shall result in disqualification. This Section 5.9(b) shall be enforced at all times while at the event site on race day.