7.4. Any single seat Special and non-centre seated Production based Vehicle without windows must be fitted with either arm restraints to SFI standard 3.3 or on the driver’ s side( both sides for a single seat Special) one-piece protection net( s) affixed securely on the inside of the safety cage using a quick release system situated on the upper part.
a. The use of " clip " fixings is recommended. b.
The fixings of the net on the lower part must not be removable without the use of tools. These nets must be to SFI standard 27.1 or have the following characteristics:
8. Miscellaneous
• Minimum width of the strips: 19 mm
• Minimum size of the meshes: 25 x 25 mm
• Maximum size of the meshes: 60 x 60 mm
and when viewed from the side must reach from the centre of the steering wheel to the rearmost point of the seat on the side concerned and must protect the window opening to the centre of the steering wheel.
8.1. Vehicles must be fitted with at least one mirror of minimum surface area 50 sq cm securely mounted to give a clear view to the rear. The edges of the mirror must be protected by a suitable cover to help prevent injury in event of an accident.
8.2. Where advertising is allowed on windscreens this must not obscure the Driver’ s vision nor reduce the minimum unobstructed vertical height to less than 250mm.
8.3. Vehicles must be presented at Scrutineering with all steering mechanisms, suspension linkages and flexible brake lines in a clean condition.
8.4. Four-wheel steering is permitted unless the Official Documents state to the contrary.
9. Autocross Vehicles
9.1. Categories and Classes are free but must be stated in the Official Documents. The following Classes are recommended and where used must comply with Arts. 9.2 – 12.9 below. Capacity splits must be specified in the Official Documents
a. b. c. d.
Economy –“ standard” production saloon cars Rally Vehicles All other Vehicles based on production Vehicles Specials and all four-wheel drive Vehicles
9.2. Vehicles which have never been homologated but which comply with App. 16 Art. 2.2 and App. 16 Art. 2.3 are eligible for Class B( Art. 9.1b).
9.3. Category 1. Those that have been homologated in Groups‘ A’ or‘ N’ of the FIA Appendix‘ J’, or Groups 1, 2, 3 or 4 of the 1981 FIA Appendix‘ J’, Non homologated Series Production Cars or Specialist Rally Cars
a.
A Specialist Rally Car is a Vehicle of which at least 20 examples are manufactured within a consecutive twelve month period and is fitted with a Series Production Car Engine or Specialist Competition Engine.
b. Modifications are free within the ASN Vehicle Regulations. c.
The Vehicle must be in the configuration as supplied by the manufacturer, with the engine( any Series Production Car Engine or Specialist Competition Engine) in the original location.
d. Vehicles must retain the original number of and location of driven wheels, Front Wheel Drive( FWD), Rear Wheel Drive( RWD) or Four Wheel Drive( 4WD), except where a 4WD Vehicle other than a Specialist Rally Car is converted to Two Wheel Drive( 2WD) without structural alteration.
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 16 Part A( Autocross and Clubcross) Appendix 5- Technical Regulations
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