Solo Rules & Classes

Texas Region Supplementary Rules

2021 PAX Index

Solo Rules 

Solo rules is your home to view the current Solo Rulebook, Supplemental class rules, ProSolo rules, FasTrack, and Rules proposals. The content on this page will provide valuable information for Solo compliance in the SCCA. 

To request a new car classification, adjustment or clarification on a rule, click on the link below to submit a letter:

Send a Request to the Solo Events Board

Rule Making Process

    The Rule Making Process - coming soon
    Rule Making Process Flow Chart


    Current and Archived FasTracks
    Open Rules Change Proposals

Quick Reference Guides

    Helmet Certification Allowances with Label Chart - Updated 11/2/2020
    Category Allowance "Cheat" Sheet
    Street Category classing by Manufacturer 
    Solo Spec Coupe (SSC) Official Specifications


    Solo Safety Steward (SSS) and Junior Driver Program (JDP) Webinar Training schedule and registration
    Junior Driver Program (JDP)
    For more training material login to your membership at, click on member resources, then file cabinet and finally scroll to Solo

Event Waiver Procedures

    Waiver Procedures
    Waiver Checklist (47 states, excludes California, Florida, and New York)
    Waiver Checklist for California
    Waiver Checklist for Florida
    Waiver Checklist for New York
    Affidavit of Sole Custody

2021 Solo Rules

The 2021 Solo® Rules online are made available by SCCA Solo as a courtesy to our entrants, volunteers and anyone interested in learning more about technical regulations governing SCCA Solo. If you would like a copy of the printer National Solo Rules, will be available on Amazon. Click here to purchase a printed copy of the 2021 SCCA Solo rules on Amazon.  

The 2021 Solo Rules online version is available in Adobe Acrobat format, version 10 or later. Download the latest version of Adobe Acrobat Reader here. iPad and iPhone users should save this file in the acrobat reader app, not in ibooks (ibooks crashes when trying to use the search feature)

- 2021 Solo Rules download - Updated 6/24/2021

- 2020 ProSolo Rules download 

- 2021 ProSolo Rules amendment download 


Supplemental Classes

Supplemental classes are provided to help give regions other class options for members at their events. Some of these supplemental classes are run at National Solo events and even the Tire Rack SCCA Solo Nationals. Those classes that compete at Solo Nationals are not eligible to win a championship. 

Allowed at all National Solo events including Solo Nationals

    - Classic American Muscle (CAM)
    - Formula Junior - Not Currently Allowed at any events (Regional or National)
    - Formula SAE

Allowed at all National Solo events except Solo Nationals

    - Xtreme Street (XS)
    - Electric Vehicle Experimental (EVX)

Regional only 

    - Heritage Classic