Article C3.3.1
Digital legality checking
Technical Regulations
Article C3.3.1
Digital legality checking
Chapter: C3
In Simple Terms
The FIA checks if F1 car parts are built to the correct shape and size using computer models (CAD). Teams must follow the exact design specifications without extra tolerance (wiggle room), except for tiny rounding errors that happen naturally in computer design.
- FIA uses CAD models to digitally verify that car components meet all geometric requirements
- Teams can only design to the edge of allowed limits or specific features when rules explicitly permit it
- Components must match their precise design shape without tolerances, except for normal computer rounding
- This ensures fair competition by preventing teams from exploiting grey areas in measurements
Official FIA Text
Assessment of geometric compliance with Article C3 carried out digitally using CAD models. Components may only be designed to Reference Volume edge or precise geometrical feature when regulations specifically require it. Components must follow precise shape without tolerance except normal CAD round-off.
digital legalitycad modelsgeometric compliancecomponent designtolerance
2026 Season Regulations