CHAPTER 7 COMPETITOR VEHICLES AND VEHICLE SAFETY EQUIPMENT Appendix 2- General Technical Regulations
1. The following Technical Regulations are mandatory and apply to Vehicles in all forms of Competition( other than Karting). Vehicles must also comply with the appropriate Specific Technical Regulations. Where there are several regulations concerning any particular subject it shall be taken as a general principle that one does not override another unless specifically stated.
2. As a general principle in all Technical Regulations it is prohibited to carry out any tuning or modification that is not specifically permitted. The fact that some modifications are mentioned as prohibited does not imply that others are allowed.
3. Disabled Drivers( Chapter 6) are permitted to make modifications approved by the ASN solely for the purpose of enabling operation of the Vehicle control systems.
4. Scrutineering( See also Chapter 7 App. 12 Applies)
5. Before taking part in any Competition or Practice for any Competition all Vehicles must be presented to the Event Scrutineers for examination and approval
Specific elements 6. Chassis / Body( including aerodynamics) Must:
6.1. Be fitted with bodywork including a Driver( and Passenger) compartment isolated from the engine, fluid filled batteries, gearbox, hydraulic reservoirs( with the exception of fire extinguishers) pressurised above atmospheric, pressure pneumatic reservoirs and accumulators, transmission shafts, chains, belts and gears brakes, road wheels, suspension components including their operating linkages and attachments, petrol / fuel tanks, oil tanks, water header tanks, catch tanks and fuel system components( other than where such components comply with Appendix 4 Arts. 5.1 and / or 5.2) such as to prevent there being a hazard.
6.2. Except for Vehicles of Periods A-E front engine Vehicles to be fitted with a bonnet covering the engine and all its’ major components.
6.3. Except for Vehicles of Periods A-E exposed transmission shafts, gears and chains must be guarded so as to prevent any hazard.
6.4. Where a radiator is not isolated from the Driver / Passenger compartment a suitable deflector must be fitted to prevent fluid directly coming into contact with the Vehicle’ s occupants.
6.5. Except for Vehicles of Periods A to E and which in period specification were not equipped with a bonnet or casing of metal or solid fire-resistant material covering and surrounding the main engine structure have a protective bulkhead of non-flammable material between the engine and the Driver / Passenger compartment capable of preventing the passage of fluid or flame. Gaps must be sealed with suitable flame proof material that completely closes any gap at all times.
6.6. Magnesium is prohibited for bulkheads. 6.7. Have a complete floor of adequate strength rigidly supported within the Driver / Passenger compartment.
6.8. Not have the space normally occupied by Passengers encroached upon in such a way that may impede extrication of the Driver from that side but may have the Passenger seats removed.
6.9. Except for racing cars or cars of A to D be equipped on all wheels with mudguards which present no sharp edges and cover the complete wheel( flange + rim + tyre) around an arc of 120 degrees. This minimum coverage must:
a. be achieved with a continuous surface of rigid material within which ventilation louvres may be fitted. The tyre must not be visible when viewed from above. When viewed from the rear the tyre must not be visible above any point 50mm or more above the axle centre line b. extend forward ahead of the axle line
Motorsport UK 2025 National Competition Rules Version 11
Chapter 7 Appendix 2- General Technical Regulations 243