If the number of engines is limited by regulations, homologated seals must be put in place. Each engine will be linked to the number of the car. Each engine must be sealed before being used by the competitor in an Event.
The breaking of one or more seals must be authorised beforehand by the Technical Scrutineers on pain of a sanction which may go as far as exclusion. The breaking of any seal will be considered as a change of engine.