It's coming at you fast... 2 important updates for this upcoming weekend!

Rulebook Revision B
Revision B of the Pro Watercross rule book has been posted on the Pro Watercross website. This latest revision includes the following changes. 
  1. Allowance for removal of rubber plates in Yamaha runabout ride plate/ intake assemblies - Section 24.10.4.
  2. Allowance for the removal of boarding steps - Section 24.10.13.
  3. Identified IROC allowances in the Runabout Box Stock - Section 33.2 and 33.4
  4. Allowance for aftermarket flame arrestors in Runabout Box Stock - Section 33.5
  5. Addition of the IROC GP rule set - Section 39.
  6. The definition for the IROC class in the glossary - Appendix D.
  7. Correction in technical rules for all classes: Corrected reference to general rules to be section 24. Incorrectly pointed to section 23 in revision A. 
IROC Racing Classes
Following in the tradition of a very storied history of racing, Pro Watercross is pleased to announce the creation of the new IROC classes. IROC classes are designated for the SeaDoo Spark and include a Box Stock and GP class.  The Box Stock will utilize the rules established for Runabout Box Stock while the GP class rules are specific to the class and have been added as the new section 39 in the rule book. 

The creation of the new classes will help increase ridership by providing specific classes to cater to Spark owners.  The 2 classes are open to riders of all experience levels and allow participants to race their stock watercraft or to make modifications to maximize the performance of their Spark.

The new classes will be available starting with the Moto Surf - Atlantic City - July 23-24.

For rule details see the latest version of the rule book on the Pro Watercross website.