If Regions run under National Events Classing, and include a non-production class for Unlimited Category vehicles, it is recommended that Regions run these suggested classes for Formula Cars, Sports Racers and Specials.

• Time Trials Special (TTS) is for any open wheel, sports racer or other vehicle that doesn’t fit into any other class. Cars must meet safety requirements for SCCA HillClimb or GCR.
  
  
• Time Trials Atlantic (TTA) is for SCCA Road Race legal Formula Atlantic cars, Formula B/1000 cars, P1 and P2.
  
  
• Time Trials Winged (TTW) is for SCCA Legal Formula Continental/F2000, Star Formula Mazda, Formula Enterprise and Sports 2000.
  
  
• Time Trial Non-Winged (TTN) is for SCCA Legal Formula F, Formula 500, Solo Vee and SRF3.
  
  
• Time Trial Volkswagen (TTV) is SCCA Legal Formula Vee, Formula First and SRF.

Formula Cars and Sports Racers will not be eligible to run at National Time Trials Events.