2025 Competition Rule Book Last Updated February 11, 2025

General:

Rule Book Introduction
IJSBA Corporate

IJSBA Homologation

IJSBA Aftermarket Hull Homologation

Runabout:

Rec Lites
Stock
Limited
Superstock
Open/GP
Runabout Naturally Aspirated

Vintage:

Ski
X2
SC
Vintage Ski Limited

Competition:

Competition Membership
General Competition Rules
Scoring
Authority
Discipline
Protest Appeals

Ski:

Ski Stock
Ski Lites
Four Stroke Ski Lites
Ski Superstock
Ski Modified
Ski Grand Prix
Fixed Steering Ski Stock

Appendix:

Displacement Guide
Starting Line Layout
Bond Flange
Glossary
Port Chamfering
Pump Cover Plate
Racing Number Location
Rudder Fin or Skeg
Slalom Course Layout
Sponsons
Seats
AB 506 Compliance

Freestyle

Sport:

Spec
GP