22.18. Mounted within the cockpit must use a mechanical means of attachment sufficiently robust to withstand anticipated stresses and vibration and must not present any sharp edges or projections in the vicinity of the Driver’ s or Passenger’ s body or helmet. Where possible a secondary means of attachment should also be used. Suction mounts are not acceptable as the primary mounting method.
22.19. Except for modifications specifically approved per Art. 3 above, all vehicle control pedals must automatically return to their unengaged position when driver input directly to the pedal is released.
22.20. Period Defined Vehicles( Non-Rally) taking advantage of any exemptions for Period Defined Vehicles within the NCR must have been issued with either a validated ASN Period Defined Vehicle Identity Form, an FIA Historic Technical Passport, or an approved Vehicle Identity Form issued by an ASN Registered Club, which must be presented at Event Scrutineering. This will be the definitive document defining the vehicle period.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 7 Appendix 2- General Technical Regulations 248