A. VEHICLE ELIGIBILITY: Competition is open to all vehicles conforming to the National Time Trials Classes. Some tracks do not allow Electric Vehicles. Please refer to Track Information to verify EV eligibility.

B. DECALS: All cars must have Tire Rack SCCA Time Attack Challenge decals and any required partner decals visibly placed on each side of the vehicle and a Tire Rack windshield banner at the top of the front windshield. Decals will be provided free of charge and may be obtained at registration and/or tech. A diagram of sticker placement for Time Attack Challenge events can be found here: Time Attack Challenge Decal Placement. A diagram of sticker placement for Time Trials Nationals will be available soon.

C. TECHNICAL INSPECTION: All vehicles must be presented at tech to turn in tech forms and pass the event safety inspection (Tech) if required prior to any on-course participation. Tech may also check event sponsor decal requirements and verify compliance of Vehicle Identification. Competitors are cautioned that vehicle/identification color combinations such as red/black, red/blue, and white/silver do not have adequate contrast.

D. TIMING & SCORING: All cars are required to use fully operational Westhold, MyLaps/AMB TranX260 or X2 transponders. The driver is responsible for providing correct information to Timing & Scoring. Non-functioning transponders will likely result in the loss of times.

E. RENTAL TRANSPONDERS: Rental transponders are available through registration.