UIM · Hull and handling

Aftermarket seat cover

UIM answers this part for 15 of its classes. 7 of those answers are permissions, with or without limits attached, and 8 are not. 3 are inherited from a parent class the rulebook points at.

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This is one body's answer, not the sport's. You are bound by whichever body sanctions the event you enter, and where both govern you, you are held to the stricter of the two. The differences are set out in the rulebook comparison.

The 10 mm cover thickness cap sits in the GLOSSARY, not in the class rules - easy to miss and easy to measure.

Where it stands, class by class

15 classes, grouped by the answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules. 3 of them publish no component rules of their own and are marked below; for those, the link to the parent class is read from the categories table rather than stated in the rulebook.

Governed by the parent class 8 classes

No component rules are published for this class and no single parent class is named, so this part cannot be answered for it. That is an absence in the rulebook, not a permission.

• Endurance · 317.03
• Freestyle Amateur · 312
• Freestyle Free · 312
• Jet Raid · 317.01
• Offshore · 317.02
• Parallel Slalom · 313
• Ski Future Electric (SFE) · 302.01
• UIM Hydro-Fly · 900

Legal, within limits 3 classes

The cover may be changed, including covering seat and backrest as a single piece, provided the shape and dimensions are unaltered. The glossary caps aftermarket seat covers at 10 mm thickness and forbids altering the original shape.

• Runabout GP4 · 502.01
• Runabout Juniors GP4 · 302.01 · borrows another class
• Runabout Ladies GP4 · 302.01.01 · borrows another class

Legal, within limits 1 class

Cover may be changed. 10 mm glossary cap applies.

• Runabout GP3 · 502.02

Legal, within limits 1 class

Via GP3 inheritance.

• Runabout GP2 · 502.03

Legal 2 classes

Free within the GP1 seat article.

• Runabout GP1 · 502.04
• Runabout Veterans GP1 · 302.01.05 · borrows another class

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Aftermarket seat cover: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.

Every UIM class · where the rulebooks differ · signed checks on parts the shop sells.