HVEC – CHASSIS MODIFICATION: Chassis Design and Repair, Chassis Extension/Shortening, Chassis and Suspension Modification, Chassis Rust Repair, Seat Belt Modification, PSV Rollover Strength and Stability, HPMV Attributes, 50 MAX Attributes
- HVEA – LOAD ANCHORAGE: Hooks, Tie Rails, Twist Locks
- HVEL – LOGGING BOLSTER ATTACHMENTS
- HVET – TOWING CONNECTIONS: Drawbar, Drawbeam, Towbar, 5th Wheel, Kingpin
- HVEK – BRAKE RULE
- HVS1 – STATIC ROLLOVER THRESHOLD 1: Vehicle Stability (Basic Vehicle Arrangements)
- HVS2 – STATIC ROLLOVER THRESHOLD 2: Vehicle Stability (Complex Vehicle Arrangements)