1. VEHICLE ELIGIBILITY:Competition is open to all vehicles conforming to the Open, Open Index, and Ladies Index National classes and National Supplemental classes, as defined by the 2025 ProSolo Rules.
2. DECALS:
   1. The Tire Rack® is the title sponsor for all 2025 SCCA® National Solo® events, including National ProSolo® events. Participants in these events are required to run the title sponsor decal, which is a windshield decal that is to be used at the top of the windshield. Vehicles without windshields or with plastic windshields may place the decal on the front of the car in a highly visible location approved by the Event Lead or their designee. Decals other than the official Tire Rack® banner, except those required by ProSolo Staff, are prohibited on the windshield.
   2. Additional required event decals are one SCCA® (on the front) (legacy SCCA wheel is no longer accepted) and 2 ProSolo decals (one on each side).
   3. A 2D-style barcode is used by National Solo for each competitor's helmet. This barcode should be affixed to the competitor's helmet in an accessible location for scanning at the start line. Any and all other barcodes (SCCA Regional, bar codes for other events or for other drivers if you are sharing a helmet) must be covered during the event so the National Solo barcode for the driver pulling to the start line is the only one visible.
   4. Solo 2025 Tech decal on each competitor helmet, signifying that it has been teched and is compliant throughout the 2025 season.
   5. Event Tech decal placed on the upper or lower left of the windshield of the vehicle (or other pre-approved location), signifying that the driver has gone through check-in/tech
      • “2” decal placed next to the tech decal if the vehicle has two drivers in the same class.
   6. Decals, including Class letters & Car numbers, must be placed on the vehicle as shown in the document below. Class letters and car numbers must be in a color that strongly contrasts with the car’s paint color for maximum visibility. (Pro tip: Wondering if your letters and numbers contrast? Take a picture of your car in grey scale, are your Class letters and Car numbers clearly and easily seen? If not, they do not have enough contrast).  
      • All SCCA-required decals and some contingency decals are available at Tech. See below for details regarding placement of required decals.
        
3. TECH PROCEDURES:
   1. Safety Inspections (Solo Rules 3.3.3) should be completed at the event site and will be completed by competitors using a Self-Tech form.
   2. Vehicle Identification verification is the sole responsibility of the competitor (Solo Rules 3.7).
   3. The official Tire Rack decal and tech stickers are the only decals permitted on the windshield.
   4. Competition vehicles are required to have a tech decal complete with the following information, affixed to the upper or lower left hand corner of the windshield (or other pre-approved location by the CTI or their designee). Vehicles that present to grid without a current event tech decal will not be allowed to proceed to the start line until a new tech form is complete for each driver and a current event tech decal is placed on the car.
      • Car Number(s)
      • Class(es)
      • Event Name
      • Event Dates
      • Minimum Weight (if applicable)
      • Wheel Base (if applicable)
      • 2 Driver vehicles may receive a “2” decal to place beside the tech decal to indicate to Grid/Impound that you are a 2-driver vehicle.
   5. When you have made your way through the tech line, you should have:
      • Received all your required vehicle decals 
        • Including your event tech decal and “2” decal, if applicable
      • Had your helmet teched
        • Received your Solo 2025 decal, if necessary
      • Turned in your completed and signed tech form
   6. The CTI can, at any time, be asked by the Chief Steward to conduct an inspection of a vehicle per Solo Rules 5.6.B.
4. PENALTIES FOR MISSING DECALS, INCORRECT NUMBERS OR BARCODES
   1. It is the sole responsibility of the competitor to ensure vehicle identification is compliant with Solo Rule 3.7, that helmet has been teched and has a Solo 2025 Tech decal, that the barcode is compliant and that any non SCCA National issued bar codes are completely covered (including covering non-driver barcodes if a helmet is being shared).
      • Penalties may be assessed if class letters/numbers are not compliant, if helmet tech decal is not affixed and/or if helmet barcode is not compliant.
      • Unused class letters or car numbers should be completely covered or removed from the vehicle so that times or penalties are not issued to the incorrect driver by Timing and Scoring or by Course Workers.
   2. Competitors at the start line with non-compliant car numbers or class letters will be allowed to complete the heat they are running. An event official (Chief Steward or Event Lead) will inform them of the non-compliance and let them know the deadline for remediation. If remedial action is not taken by the deadline, a penalty may be assessed; penalties include the addition of cones or a DSQ (See B.4. above for decal information).
   3. Competitors at the start line with the wrong number on their car, 2 sets of numbers, or the incorrect/too many classes showing will receive a warning for the first offense, a cone penalty for the second offense, and may receive a DSQ for three or more offenses at the same event.
   4. Competitors at the scanner with more than one (1) or an incorrect barcode showing on the helmet will receive a warning for the first offense, a cone penalty for the second offense and may receive a DSQ for three or more offenses at the same event.
   5. A driver presenting to grid without the appropriate Event Tech decal or helmet tech decal (Solo 2025) will be directed to the Tech/Impound area to complete a new tech form and receive an event tech decal or get the helmet inspected and decal applied.
5. IMPOUND PROCEDURES:
   1. All competition vehicles will be impounded per ProSolo Rules 20.10.K to assure that competitors have complied with the SCCA National Solo Rules and the Supplementary Regulations for the event. Car information verification will also be conducted in Impound.
   2. Vehicles will be impounded following the completion of each Session until released by the Chief of Impound, their designee, or the Chief Steward. The driver of each vehicle or a designated representative must remain in the impound area near the vehicle during the impound period. Karts will be allowed to be driven to the scales under close supervision by event officials. Impounded vehicles may be held until the results are audited.
   3. ProSolo officials reserve the right to inspect any or all cars to verify conformance to the rules. Drivers should be prepared to show documents of their vehicle specifications and to assist in the verification of vehicle compliance with these specifications.
   4. Competitors may observe but Impound inspectors must not be hindered in their assigned duties by anyone in any way.
   5. Impound does not act on hearsay information regarding competitor concerns. If competitors suspect a rule violation, they should file protests in accordance with the National ProSolo Rules. Rule 20.10.P, Protests.
   6. Classes that have minimum weights are required to be weighed. It is the competitor’s responsibility to know if their vehicle has a minimum weight requirement.
6. SOUND POLICY:Refer to Solo Rules Rule Appendix H. Sound requirements are strictly enforced.

Rationale: Members are asked to realize that sound level measurements are designed to help us be good neighbors to those that work or live near our events. It is not intended as a "gotcha!" to catch drivers unaware. All competitors should come to the event in good faith with appropriate equipment keeping sound levels below the limit. Intentionally "pushing the envelope" of sound levels is in poor taste and puts our sites at risk.

Exceptions to Appendix H of the Solo Rules, 2nd and 3rd paragraphs:

  G. TIMING AND SCORING:Refer to ProSolo Rules Section 20.10.

1. Class finishing positions will be determined by combining the best corrected time (or corrected index time for Index classes) from each course during the class competition, which will normally consist of two (2) runs per side per Session.
2. Official times will be posted following the completion of each class session. Any initial questions about these results should be        directed to the Chief of Impound or designate. THE TIMING & SCORING TRAILER IS OFF LIMITS FOR COMPETITORS, CREW, AND SPECTATORS unless invited to enter by an event official.
3.  Live timing is available at sololive.scca.com.

Updated 5/9/25