PHA events are operated under the PHA Supplementary Regulations, as defined in the following document:
2024 PHA Supplementary Regulations
The PHA Supplementary Regulations document also defines the required safety equipment for cars and drivers.
Car preparation rules are defined in the following documents:
- GCR classes are defined in the current SCCA General Competiton Ruleboook.
- The Solo Street Modified class is defined in the current SCCA Solo Rules.
- The Solo Street Prepared classes are frozen at the 2022 Solo Rules as of the 2023 season.
- PHA Supplemental classes are defined in the PHA Supplementary Regulations Document linked above.