When parc fermé starts
Cars typically enter parc fermé conditions at the start of the first qualifying segment. From that moment, only limited changes are permitted without steward approval.
What teams can still change
Minor adjustments such as brake balance, wing angle within homologated ranges, and driver comfort settings are often allowed. Replacing damaged parts may be permitted if the FIA confirms like-for-like specification.
Weather changes sometimes justify a different wing level; teams must request permission and prove conditions changed significantly.
Why the rule exists
Without parc fermé, top teams could run extreme qualifying setups and rebuild cars overnight for the race. The rule forces compromise and keeps the field closer on Sunday.
Frequently asked questions
- Does parc fermé apply after sprint qualifying?
- Sprint weekends have separate parc fermé milestones for sprint and Grand Prix qualifying. Teams must track which session locks which setup.