2015-2016 ISOC Rulebook  Updated 1-5-16

2015-2016 ISR Rulebook



Be sure to check back for updates periodically. It is up to you to be aware of rule changes posted here.



  • Pro Open Qualifying – When 19 or less riders for qualifying, 9 will transfer to the final.  The remainder go to the LCQ and the first place finisher in the LCQ gets the last gate pick for the front line.  Updated 1-22-16.
  • YELLOW FLAG ZONE:  The yellow flag zone shall start at the first yellow flag and extends all the way up to and including the incident.  Care should be taken by rider to not put the downed rider/incident in harms way through careless and aggressive acceleration out of yellow flag zone.
  • NO PASSING is allowed in any yellow flag zone (the area from the yellow flag to the end of the incident).  A yellow flag means there is an incident ahead and there may be some track blockage.  All riders will slow down to observe the caution, and most importantly NOT PASS or gain any significant ground on next competitor until clear of the incident and through the yellow flag zone.
    • Penalty:  A pass under yellow will result in a furled black flag. If a rider mistakenly passes under yellow, he or she has the opportunity to immediately correct the situation by allowing the rider he/she passed under yellow to fully regain the position and advantage he originally had. If the situation is not corrected, the rider will be scored last in his/her heat or final. All calls are at the Race Directors discretion.
  • NO JUMPING – Jumping under yellow constitutes a safety hazard.  The track leaving the ground is considered jumping.  In a situation where the yellow flag is displayed for numerous laps, riders must obey the yellow flag for all of those laps.  If the yellow is waving in conjunction with a checkered flag, the riders must still obey the yellow and “roll over” the finish line.
    • Penalty:  Any rider caught jumping under yellow will receive last place points or a DQ at the Race Directors discretion.
  • GAINING UNDER YELLOW – Gaining “too much” ground on rider ahead of you is not allowed in a yellow zone.  Yellow flag zones are not the place to make up time on your competition.  As a general rule of thumb, a rider making up more than 1 sled length of ground will be considered “gaining too much ground”.  A rider who gains too much ground and immediately corrects the error by slowing up and re-establishing the original “gap” shall not be penalized. Go slow, roll the jumps and get through the yellow zone safely, and then resume race speed.  “Too much ground” shall be at the discretion of the Race Director.
    • Penalty:  Rider caught gaining too much ground under yellow flag zone will be scored last or a DQ at Race Directors discretion.
  • OFF TRACK & RE-ENTRY -When a rider goes off track, they must re-enter as soon as possible in the safest spot possible. They need to either stop and look up track or we need to know they looked and then proceed back onto the track in a safe manner. We need to actually see you look up track and make sure that you don’t impede anyones progress or endanger anyone. If we, as race officials, can’t tell that you lost any ground, the result is a black flag. No one is allowed in front of the sled on the starting line. No packing down snow, etc.
  • National class advancement rules apply to National only.
  •  Jr. 10-13 class – STUDS are Allowed.  Read more here.
  • One mechanic allowed at the start line with the rider.  Upper body protection such as a TekVest or something similar, is required for the mechanic.  No arm pads needed.  Must be approved by ISOC.  If you have questions, please email a photo of the vest in question to tech@isocracing.com.  If you don’t have a mechanic armband at the start line, your rider has to start in the back row. If they are already in the back row, they will be moved to the third row.
  •  Safety tech in staging every morning. Top three to tech after every round. If you skip tech, you may get a penalty or DQ.
  •  Transponders at the National are mandatory. If you race without one, you will be scored last in your heat.
  • Late Entries – Due to an ever increasing number of “late entries” or registrations at the track, we will be sticking to our Late Fee of $25 per class for any entries done after the registration deadline. Online registration closes the day prior to the weekend of the event.
  • Bib Numbers – The Pro Lite drivers running the NATIONAL ACS Circuit as their primary circuit will be allowed to run single and double digit bib numbers. Numbers will be assigned on a first come, first served basis once membership opens September 12, 2015.
  • Orange Helmets will be STRICTLY enforced this year. There will be no one allowed on the track if their helmet does not meet the standards set forth in the ISR rulebook above.