CHAPTER 7 COMPETITOR VEHICLES AND VEHICLE SAFETY EQUIPMENT

The Appendix numbers in this text refer to the Appendices to this Chapter except where stated. The following Appendices of this Chapter apply:

App.1 Competition Car Log Books (CCLB) and Vehicle Passports (VP). App.2 General Technical Regulations. App.3 Roll Over Protection Systems (ROPS). App.4 Fuel and Fuel Systems. App.5 Electrical Systems. App.6 Fire Extinguishers and Systems. App.7 Seats Harnesses and Headrests. App.8 Exhaust Silencing and Noise Testing. App.9 Onboard Cameras. App.10 Competition Numbers. App.11 Electrified Vehicles. App.12 Scrutineering. App.13 Charts and Diagrams.

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Motorsport UK 2025 National Competition Rules Chapter 7 - Competitor Vehicles and Vehicle Safety Equipment 239

1. General

1.1. Vehicles competing in Events must conform to the Technical Regulations and any specific discipline class regulations and Championship Regulations as appropriate. If it does not conform it will not be eligible to compete. Failure to conform is a breach of the NCR and may be subject of penalty ( Chapter 2 ) and guideline penalties at Event are provided by App. 13.

1.2. The deliberate presentation of a Vehicle or any component part of it that is not eligible under the applicable Technical Regulations is considered as a dishonest act offending the overarching principle of sporting fairness embodied in the Code and the NCR and will be referred to the ASN Disciplinary Officer and may result in the matter being referred to the National Court and the Competitor subject of interim suspension of Competition Licence . Non-deliberate matters will proceed in accordance with the relevant provisions of the NCR and guideline penalties are provided by App. 13.

1.3. The ASN reserves the right to amend these Regulations at any time on grounds of safety or in the interests of fair and orderly Competition ( Chapter 1 Art.1.4). Without prejudice to the generality of that reserved authority the ASN will normally provide for amended Technical Regulations to be published as effective from the next ensuing calendar year. Amendments to present NCR and this Chapter are published on the ASN website. It is the Competitor ’s responsibility to be aware of all applicable Regulations.

2. Specific Regulations 2.1. The general Technical Regulations applying to Vehicles are set out in App.1.

2.2. Specific Regulations are provided by the relevant Appendices of this Chapter and all Official Documents relating to Technical matters including Championship Technical Regulations and where applicable all discipline-related Technical Regulations and any relevant FIA Homologation.

2.3. Where Supplementary Regulations (SRs) leave any doubt as to the category in which a particular type of Vehicle falls for the purposes of the Competition the position shall be governed by the definitions set out in these Regulations.

2.4. Competition Car Log Books / Vehicle Passports are required for certain sporting disciplines as detailed in the Specific Regulations . Vehicle Passports are available from International , National and other approved Scrutineers . Vehicle inspections can be arranged by appointment with an appropriate grade local Scrutineer.

2.5. The Specific Regulations relating to Competition Car Log Books and Vehicle Passports are provided in App.1.

2.6. By reciprocal arrangement the ASN will recognise Log Books issued by Motor Sport Ireland . Such Log Books are considered valid for Competitions within the UK.

2.7. As a general principal of all Technical Regulations it is prohibited to carry out any tuning or modification unless expressly permitted by the relevant Regulation(s) or a component is stated to be ‘free’.

2.8. Specific Regulations applying to Vehicles that are not powered exclusively by an internal combustion engine are to be contained in Official Documents and those Vehicles are additionally subject to the relevant provisions of Apps. 2 – 10 of this Chapter.

2.9. The Regulations for Electrified Vehicles are provided by App.11 . 2.10. The Regulations for Roll-Over Protection Systems (ROPS) are provided by App.3. 2.11. The Regulations for Fuel Systems are provided by App.4

2.12. The Regulations for Electrical Systems except Electrified Vehicles are provided by App.5 Regulations for Electrical Systems except EV.

2.13. The Regulations for Fire Extinguishers and Systems are provided by App.6. 2.14. The Regulations for seats harnesses and headrests are provided by App.7 . 2.15. The Regulations for exhaust systems and sound testing are provided by App.8.

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2.16. The Regulations for On Board Cameras are provided by App.9 2.17. The Regulations for Competition Numbers are provided by App.10

2.18. All Vehicles must comply with the Safety Regulations as provided by their Specific Technical Regulations and Apps. 2 – 10 of this Chapter.

2.19. Vehicle occupants wearing normal Personal Safety Equipment ( Chapter 9 ) and seated in their normal position with safety harness fastened and the steering wheel in place must be able to evacuate the Vehicle in a maximum of 10 seconds

2.20. All Vehicles must be made available to the Event Scrutineers for examination and approval before taking part in any Competition or Official Practice .

Specific Regulations applying to scrutineering are provided by App.12. The role and powers of Technical Officials are provided by Chapter 5 of these NCR.

If a Competitor has any doubt as to the conformity of the Vehicle or any component in it being used or intended to be used in Competition then the Competitor should consult and seek advice from a relevant Scrutineer (for example a Championship Eligibility Scrutineer) or the ASN.

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CHAPTER 7 COMPETITOR VEHICLES AND VEHICLE SAFETY EQUIPMENT Appendix 1 - Competition Car Log Books (CCLB) and Vehicle Passports (VP)

Note: These Regulations may be amended or replaced by Regulations relating to a digital Vehicle Scrutineering Record.

1.1. To obtain a Vehicle Passport , a registration document (where appropriate) for the Vehicle , or Vehicle identity number is required. Recent good quality colour photographs showing the Vehicle static, unoccupied and in tyre contact with the ground must be shown on the CCLB / VP . Photos for VPs must include a front 3/4 view from right side, rear 3/4 view from left side (both with number plate legible where applicable) and an engine bay view.

1.2. CCLB / VP continuation sheets may be obtained from the ASN. 1.3. CCLBs / Vehicle Passports refer to complete cars and must not be transferred with a bodyshell.

1.4. Any CCLB / VP issued will remain the property of the ASN , which reserves the right to withdraw or suspend it at any time, stating the reasons why.

1.5. CCLBs/VPs must be sent to the ASN for any of the following reasons:

a. Issue of new VP . b. Change of engine type or capacity. c. Change of bodyshell. d. Change of ownership. e. Change of address. f. Vehicle disposal or dismantling. g. Change of Vehicle colour (with new photos). 1.6. CCLB continuation sheets may be obtained from the ASN. 1.7. CCLBs first issued prior to 31 December 2009 have now expired. 1.8. All other CCLBs will expire on 31st December 2025. 1.9. Once a CCLB has expired a new Vehicle Passport will need to be applied for. 1.10. Until the date of expiry a CCLB may continue to be returned to the ASN for amendment as provided above.

1.11. Vehicle Identification Stickers for the purposes of Event Scrutineering record keeping are required for certain sporting disciplines as detailed in the Specific Regulations.

1.12. Event Scrutineering records are associated to the Vehicle Identification Sticker and held centrally by the ASN . Vehicle Event Scrutineering records are accessible by selected Scrutineers.

Motorsport UK 2025 National Competition Rules

Chapter 7 Appendix 1 - Competition Car Log Books (CCLB) and Vehicle Passports (VP)

242

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

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c. extend downward behind the wheel.

6.10. Aerodynamic devices may only be fitted to Racing and Sports Racing Cars (unless prohibited by an Approved Formula) or where specifically permitted where FIA homologated or where complying with National type approval.

6.11. Such devices must not extend beyond the maximum width of the Vehicle above the maximum height of any roof or for an open car the maximum height of the ROPS.

6.12. For Saloon and Sports Cars such devices must not extend longitudinally from the bodywork by more than 100mm.

6.13. For Sports Racing Cars such devices must not extend longitudinally from the rear wheel axis by more than 1100mm.

6.14. Racing Cars must comply with Chapter 12 App.14 .

6.15. If originally fitted with Driver / Passenger doors hatchback doors sliding doors opening boots or tailgates these must be secured in the closed position during Events.

6.16. Have effective means of ventilating closed cars.

6.17. Tinted glass in any window which can significantly affect through vision (in or out) or distort the colours of signal flags or lights is prohibited.

6.18. With the exception of Cross Country Vehicles Racing Trucks and Karts in all Vehicles with the Driver seated normally the soles of their feet resting on the pedals in the inoperative position shall not be situated to the fore of the vertical plane passing through the centre line of the front wheels.

6.19. Art.6.18 above is not applicable to Vehicles constructed prior to 1.1.99 or for those Vehicle designs which have participated in an ASN Permitted Championship prior to 1.1.99.

7. Seating App.7 Applies 7.1. Must have a normal adequate seat for the Driver (and any permitted Passenger).

7.2. With the occupant seated the seat must be correctly located and securely anchored within the compartment and must not tilt hinge or fold unless it is a production seat fitted with a serviceable locking mechanism preventing independent operation.

7.3. The seat must support and retain the Driver within the Vehicle.

7.4. The seat cushion (i.e. the part on which the occupant sits) when uncompressed must not be less than 152.5mm below the top edge of the adjacent body side or door.

7.5. Any other seats fitted must similarly comply and all seats must face forward. Vehicles of Periods A to D are exempt from this requirement.

7.6. If a single seater the maximum time for a Driver to get in or out of the Vehicle must not exceed 10 seconds.

8. Engines

8.1. Paddock Safety : In areas to which the public has access no engine shall be run with the gears engaged whilst the Vehicle has any driving wheels not in direct contact with the ground unless all moving parts are adequately guarded and with the exception of Karts a competent person is seated in the driving seat.

8.2. If forced induction is used the coefficient will be 1.7:1. unless stated otherwise in Specific Technical Regulations or Official Documents .

8.3. Must be equipped with a positive method of throttle closing by means of external spring/springs so that in the Event of failure of any part of the throttle linkage the throttle(s) are sprung closed.

8.4. Vehicles fitted with electronic throttle control as standard original manufacturer ’s equipment for that Vehicle are exempt from Art.8.3 above.

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9. Suspension

9.1. Must be fitted with sprung suspension between the wheels and the Chassis and which must be controlled to avoid fouling of wheels on Chassis or bodywork.

9.2. Vehicles of Periods A and B need not have sprung suspension if originally built without it.

10. Brakes 10.1. Must be fitted with brakes that are operative and capable of stopping the Vehicle as required.

10.2. Non-ferrous disc brakes are prohibited unless a Standard Part for that Vehicle or specifically authorised by the ASN for a class or category of Vehicle .

11. Steering

11.1. Must have a steering wheel with a continuously closed rim (except for Drag Race Vehicles). ‘D’ shape wheels are permitted.

11.2. Specifically not permitted are wheels having a noncontinuous rim shape similar to that shown in the Diagram 2 (a). Along with other continuously closed rim shapes, those similar to Diagram 2 (b)-(c) are permitted.

11.3. Vehicles of Periods A and B may have a tiller or alternative to a steering wheel if it formed part of the original Vehicle .

11.4. Steering movement must be controlled to avoid fouling of wheels on Chassis or bodywork.

11.5. Rear wheel or four-wheel steering is prohibited unless fitted on a Production Vehicle by the manufacturer or permitted under the Specific Technical Regulations or Official Documents.

12. Wheels 12.1. Must have not less than four road wheels and tyres (excluding the spare).

12.2. Must not be fitted with any wheel spacer exceeding 25mm in thickness or of less than hub diameter. Multiple or Laminated Spacers and extended studs are prohibited.

12.3. Must have all hub nave plates and wheel embellishers removed.

13. Tyres Chapter 8 may apply

13.1. Must have tyres complying with Specific Technical Regulations and/or Construction and Use Regulations (if Standard Road Tyres ) for the duration of the Event.

13.2. Tyres if treaded must have not less than 1.6mm of tread remaining at the start of a Race except Formula Ford 1600 which must have a minimum of 1mm of tread remaining at the start of a Race.

13.3. Where freedom of choice of tyres is left to the Competitor the responsibility rests with each Competitor to ensure that the tyres to be used are of adequate rating having regard to the potential speed of their Vehicle and the nature of the Event.

13.4. The fitment and / or use of pressure control valves to Wheels and / or tyres is prohibited.

13.5. Unless specifically permitted under the Regulations of the Event the use of chemical tyre softeners is not permitted.

13.6. The interior of the tyre (space between the rim and the internal part of the tyre) must be filled only with air or nitrogen. This does not preclude the use of inner tubes.

14. Cooling

14.1. Must have any fluid carrying lines or tubes carrying coolants through the Driver / Passenger compartment painted red except for HV Battery cooling lines. If lines are non-metallic then must be internally or externally metal braided hydraulic pressure hose. Where braided hose is used then all cooling lines must use anodized unions.

Motorsport UK 2025 National Competition Rules Chapter 7 Appendix 2 - General Technical Regulations 245

14.2. Screwed hose clips (e.g. ‘Jubilee Clips’) may only be used in conjunction with a suitably swaged pipe.

14.3. Radiator Caps should be pressure rated to suit the system and positioned or shielded in such a way that hot water or steam cannot scald the Driver of the Vehicle if they become opened or broken in an accident.

15. Transmission

15.1. Must have the transmission outside the Driver / Passenger compartment beneath the floor or secured in casings or coverings of solid material.

15.2. Must be equipped with a reverse gear in normal working order unless otherwise stated in Specific Technical Regulations . Racing Cars of Periods A to E are exempt from this requirement.

16. Front Engined Cars

16.1. With front engine Vehicles a propeller shaft restraint should be fitted. Either safety hooks or a rigidly fixed steel panel of not less than 18swg.

17. Clutch and Bell Housing Protection

17.1. It is recommended that a shield is placed to guard the clutch / bellhousing and to protect in case of clutch / flywheel derangement. This can be a 1⁄8in steel plate or sandbag type absorber as used in drag racing.

18. Oil Systems

18.1. Must have any oil lines passing through the Driver / Passenger compartment protected and if non- metallic to be of internally or externally metal braided hydraulic pressure hose.

19. Weight / Ballast

19.1. If subject to a minimum weight that must be the weight of the Vehicle in the condition in which it crosses the finishing line (excluding Driver and Passenger ) or at any time during the Competition and / or Practice (except for certain classes or formulae which include the Driver in the total weight).

19.2. Any ballast required must be attached to the shell / Chassis via at least 4 mounting points a minimum M10 grade 8.8 or 10.9 steel fasteners, each with steel counter plates of at least 400 sq mm surface area and 3mm thickness.

19.3. Provision must be made for the fixation of seals by Scrutineers if deemed necessary.

19.4. Where ballast is fitted to touring sports, sports racing or GT Vehicles it shall be fitted in the Passenger ’s location.

19.5. Single seat racing cars are exempt from the above mounting requirements.

20. Safety 20.1. All Vehicles must comply with Safety Regulations as itemised under their Specific Technical Regulations.

20.2. The Vehicle occupant(s) seated in their normal position wearing normal equipment with seat belts fastened and the steering wheel in place must be able to evacuate the cockpit in a maximum of 10 seconds.

21. Miscellaneous

22. Vehicles: 22.1. Must be of sound construction and mechanical condition and be well maintained. 22.2. Must have positive fastenings for all doors and all hinged or detachable parts of the bodywork. 22.3. Must have no temporary parts incorporated in the construction.

22.4. Need not be equipped with seat belts speedometer spare wheel or bumpers if the Event is held on private property unless specified to the contrary by Official Documents . Any exposed sharp ends of bumpers or other Bodywork must be protected.

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22.5. Must not be a Vehicle of commercial type such as a van / pick-up which was initially intended solely for commercial or goods carrying unless permitted by the Official Documents.

22.6. Must have a minimum distance of 1830mm between the centre lines of the foremost front and rearmost rear substantial load-carrying wheels unless complying with an Approved Formula or being a standard production Vehicle.

22.7. Except for racing cars must be fitted with a windscreen.

22.8. If plastic windscreen side screens or rear windows are fitted the thickness must not be less than nominal 4mm (minimum 3.8mm). Except for Vehicle models originally in production prior to 1st January 1990 for new build Vehicles from 2022 they must be Polycarbonate with a nominal thickness of 6mm (minimum 5.8mm) for the windscreen.

22.9. Sports Vehicles supplied as standard with plastic side screens may retain them in their original thickness.

22.10. Must not have skirts bridging devices or any form of aerodynamic device between the Chassis and the ground / Track.

22.11. Any specific part of the Vehicle influencing its aerodynamic performance must:

a. b. comply with rules relating to bodywork and be rigidly secured to the entirely sprung part of the Vehicle and c. remain immobile in relation to the Vehicle .

22.12. Ground Clearance: No part of the Bodywork or of the suspended part of the Vehicle can be below a horizontal plane passing 40mm above the ground (unless stated otherwise in Official Documents ) the Vehicle being in normal racing trim with the occupants aboard.

22.13. A gauge conforming to ASN Technical requirements may be used by Scrutineers at any time during an Event to check Vehicle ground clearance. This should normally be on a recognised flat area when the Event is at a Race Circuit.

22.14. Must not carry or pass any liquids or gases other than air at atmospheric pressure in or through any tubes comprising part of the Chassis structure.

22.15. It is strongly recommended for all Competitors except Autotest participating in single Venue Competitions to have available at their paddock base and for multi-Venue Competitions to carry within their Vehicle a self-contained Spill Kit capable of effectively absorbing minor spillages of up to 1.25 litres of all Vehicle fluids – oils fuels coolants battery acid. For Autotest an adequate quantity of Spill Kits must be available with the Organisers at the Event control.

22.16. Used Spill Kits are to be disposed of in accordance with local or National guidelines and or Venue Regulations. They must not be disposed of in general waste facilities at the Event.

22.17. Information devices (including but not limited to):

a. b. c. data loggers displays instrumentation d. communication systems (where permitted) e. trip computers

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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.

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CHAPTER 7 COMPETITIOR VEHICLES AND VEHICLE SAFETY EQUIPMENT Appendix 3 - Roll Over Protection Systems (ROPS )

1. Introduction 1.1. This Appendix is for ASN National and lower status Events.

1.2. Care should be taken to check FIA International requirements for Groups, Classes and Formulae which may not be covered by this section. The ASN generally aligns itself with FIA ROPS Regulations wherever possible.

1.3. The following are various specifications and configurations that can be used in manufacturing, preparing and installing Roll-Over Protection Systems (ROPS) into Production Cars, Touring Cars Saloon and Sports Cars Art.20 , Sports Racing Cars ( Art.21 ), Single Seaters ( Art.22), and other forms of Competition Vehicles ( Art.23 ).

1.4. The details covered in this section give many permutations, the ASN mandatory requirements are the minimum acceptable.

1.5. The use of a rollbar to achieve or supplement aerodynamic effects is prohibited.

2. Definitions

2.1. Safety Cage : A structural framework designed to prevent serious bodyshell deformation in the case of a collision or a car turning over.

2.2. Rollbar : Structural frame or hoop and mounting points.

2.3. Rollcage : Structural framework made up of a main rollbar and a front rollbar (or two lateral rollbars), their connecting members, one diagonal member, backstays and mounting points (see Appendix 13 Diagram 14 and 15 ).

2.4. Main Rollbar : Structure consisting of a near-vertical frame or hoop located across the vehicle just behind the front seats.

2.5. Front Rollbar : Similar to Main Rollbar but its shape follows the windscreen pillars and top screen edge.

2.6. Lateral Rollbar : Structure consisting of a near-vertical frame or hoop located along the right or left hand side of the vehicle. The rear legs of a lateral rollbar must be just behind the front seats. The front leg must be against the screen pillar and dashboard such that it does not unduly impede entry or exit of Driver or Co-Driver.

2.7. Longitudinal Member : Longitudinal tube which is not a part of the main, front or lateral rollbar, for example, a backstay.

2.8. Diagonal Member : Transverse tube between a top corner of the main rollbar or upper end of a backstay and a lower mounting point on the opposite side of the rollbar or backstay.

2.9. Framework Reinforcement : Reinforcing member fixed to the rollcage to improve its structural efficiency.

2.10. Reinforcement Plate : Metal plate fixed to t0068e bodyshell or chassis structure under a rollbar mounting foot to spread load into the structure.

2.11. Mounting Foot : Plate welded to a rollbar tube to permit its bolting or welding to the bodyshell or chassis structure, usually onto a reinforcement plate.

2.12. Removable Members : Structural members of a safety cage which are able to be removed.

2.13. Harness Bar : A transverse tubular member attached across either the main hoop or backstays to accept harness mountings.

Motorsport UK 2025 National Competition Rules Chapter 7 Appendix 3 - Roll Over Protection Systems (ROPS) 249

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3. Specifications

3.1. ROPS must be designed and made so that, when correctly installed, they substantially reduce the risk of injury to the occupants. The essential features of an efficient ROPS are that it is designed to suit the particular Vehicle , is of sound construction, has adequate mountings and is a close fit to the bodyshell.

3.2. The ROPS must not unduly impede Driver and Co-Driver access to the vehicle. Members may intrude into the interior space by passing through the dashboard, front side trim, rear side trim, and rear seats which may be folded down.

3.3. ROPS must not extend beyond the front upper or rear suspension mounting points of the Vehicle with the exception of backstays which may extend beyond the rear suspension mounting points if necessary to achieve the required 30° angle.

3.4. Any modification to a Homologated ROPS (other than fitment of Roof Reinforcement, Windscreen Pillar Reinforcement, Doorbars and Harness Bars ) is prohibited.

3.5. Tubes must not carry any liquids or gases, other than air at atmospheric pressure, or any other item.

4. Compulsory Diagonal Member

4.1. Different ways of fitting the compulsory diagonal member are shown in Appendix 13 Diagram 14 and 15 . The combination of several members is permitted.

5. Optional Reinforcing Member

5.1. Each type of reinforcement (see Appendix 13 Diagram 16 and 21) may be used separately or combined with others.

6. Technical Specifications

6.1. Main, Front and Lateral Rollbars . These frames or hoops must be made in one piece without joints. Their construction must be smooth and even without ripples or cracks. The vertical part of the main rollbar must be as straight as possible and as close as possible to the interior contour of the bodyshell. The front leg of the front rollbar or a lateral rollbar must be straight or if it is not possible must follow the windscreen pillars and have only one bend unless a windscreen pillar reinforcement is fitted.

6.2. The mounting foot must not be rearward of the foremost point of the rollbar.

6.3. Where the main rollbar forms the rear legs of a lateral rollbar (see Appendix 13 Diagram 15 ), the connection to the lateral rollbar must be at roof level. To achieve an efficient mounting to the bodyshell, the original interior trim may be modified around the safety cage and its mountings by cutting it away or by distortion.

6.4. However this modification does not permit the removal of the complete parts of upholstery or trim. Where necessary the fusebox may be relocated to enable a rollcage to be fitted.

7. Mounting of ROPS to the Bodyshell 7.1. Minimum mountings are:

a. 1 for each leg of the main or lateral rollbar. b. 1 for each leg of the front rollbar. c. 1 for each backstay.

7.2. Each leg of a main, lateral or front rollbar must be attached, via a mounting foot, by at least three bolts, minimum M8 ISO grade 8.8 and utilising a steel reinforcement plate of a material of at least the same thickness as the wall of the tube to which it is being welded (minimum 3mm) and of at least 120cm2 area which is welded to the bodyshell (see Appendix 13 Diagram 22 to 27 ).

7.3. The mounting foot or leg may alternatively be welded directly to the bodyshell / reinforcement plate in accordance with Appendix 13 Diagram 22 .

Motorsport UK 2025 National Competition Rules Chapter 7 Appendix 3 - Roll Over Protection Systems (ROPS) 251

8. Backstays

8.1. These are compulsory and must be attached near the roofline and near the top outer bends of the main rollbar on both sides of the car. They must make an angle of at least 30° with the vertical, must run rearwards and be straight and as close as possible to the interior side panels of the bodyshell. Their materials specification, diameter and thickness must be as defined in Art.18.1 . Forward facing stays are permitted if an angle of 30° cannot be achieved with Backstays providing they do not unduly impede Driver and Co-Driver access to the Vehicle.

8.2. Their mountings must be reinforced by plates. Each backstay should be secured by bolts having a cumulative section area at least two thirds of that recommended for each rollbar leg mounting in Art.7 above and with identical reinforcement plates of a least 60cm 2 area (see Appendix 13 Diagram 22 ). A single bolt in double shear is permitted providing it is of adequate section and strength (see Appendix 13 Diagram 29 ) and provided that a bush is welded into the backstay.

8.3. The mounting foot or backstay may alternatively be welded directly to the bodyshell/reinforcement plate in accordance with Appendix 13 Diagram 22 .

9. Diagonal Members

9.1. At least one diagonal member must be fitted. Their location must be in accordance with Appendix 13 Diagram 14 or15 and they must be straight. The combination of several diagonal members is permitted.

9.2. Where two diagonals in the form of a cross are used at least one of the diagonals must be a single piece tube.

9.3. The attachment points of the diagonal members must be so located that they cannot cause injuries. They may be made removable but must be in place during Events . The lower end of the diagonal must join the main rollbar or back-stay not further than 100mm from the mounting foot. The upper end must join the main rollbar not further than 100mm from the junction of the backstay joint, or the backstay not more than 100mm from its junction with the main rollbar.

9.4. They must comply with the minimum specification set out in Art.18.1. A diagonal member fixed to the bodyshell must have reinforcement plates as defined in Art.8 above.

10. Optional Reinforcement of ROPS

10.1. The diameter, thickness and material of reinforcements must be as defined in Art.18.1 . They must be either welded in position or installed by means of demountable joints. Reinforcement tubes must not be attached to the bodyshell.

11. Transverse Reinforcing Members:

11.1. The fitting of two transverse members as shown in Appendix 13 Diagram 18 is permitted. The transverse member fixed to the front rollbar must not encroach upon the space reserved for the Driver or Co-Driver. It must be placed as high as possible but its lower edge must not be higher than the top of the dashboard.

12. Doorbars (for side protection):

12.1. Longitudinal members must be fitted at each side of the Vehicle (see Appendix 13 Diagram 18 and 21 ). They may be removable.

12.2. The side protection must be as high as possible but not higher than one half of the total height of the door aperture measured from its base.

12.3. Where two members in the form of a cross are used, at least one of the members must be a single piece tube.

12.4. Where configuration Appendix 13 Diagram 21 is used a reinforcing gusset must connect the tubes along the horizontal length.

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13. Roof Reinforcement:

13.1. Reinforcing the upper part of the rollcage by adding members as shown in Appendix 13 Diagram 19 is permitted.

14. Reinforcement of bends and junctions:

14.1. The reinforcement of the junction between the main rollbar or the front rollbar and the longitudinal members is permitted as shown in Appendix 13 Diagram 21 as is the reinforcement of the top rear bends of the lateral rollbars.

14.2. The ends of these reinforcing tubes must not be more than half-way down or along the members to which they are attached.

15. Windscreen Pillar Reinforcement:

15.1. A tube the upper end of which must be less than 100mm from the junction between the front (lateral) rollbar and the longitudinal (transversal) member and the lower end less than 100mm from the front mounting foot of the front (lateral) rollbar, as shown in Appendix 13 Diagram 68 .

15.2. The tube may be bent on condition that it is straight in side view and that the angle of the bend does not exceed 20°.

15.3. Protective Padding : Where the Driver ’s or Co-Driver ’s bodies or crash helmets could come into contact with the ROPS , non-flammable padding should be provided for protection.

15.4. It is recommended that rollbar / rollcage tubes within 150mm of a vehicle occupant’s helmet are covered with a suitable energy absorbing material. Suitable materials are Homologated by the FIA who publish specific regulations for the fitment of such materials for Vehicles participating in International Event .

15.5. Removable Members : Should removable members be used in the construction of a ROPS the demountable joints used must comply with an approved type (see Appendix 13 Diagram 30 to 38 and Diagram 46 ). The screws and bolts must be of adequate diameter and of ISO Standard 8.8 or better. FIA Homologated demountable joints are also permitted.

16. Protective Padding:

16.1. Where the Driver ’s or Co-Driver ’s bodies or crash helmets could come into contact with the ROPS, nonflammable padding should be provided for protection.

16.2. It is recommended that rollbar / rollcage tubes within 150mm of a vehicle occupant’s helmet are covered with a suitable energy absorbing material. Suitable materials are Homologated by the FIA who publish specific regulations for the fitment of such materials for Vehicles participating in International Event .

17. Removable Members:

17.1. Should removable members be used in the construction of a ROPS the demountable joints used must comply with an approved type (see Appendix 13 Diagram 30 to 38 and Diagram 46). The screws and bolts must be of adequate diameter and of ISO Standard 8.8 or better. FIA Homologated demountable joints are also permitted.

17.2. Demountable joints must not be used as part of a main, front or lateral rollbar because they act as hinges in the principal structure and allow deformation. Their use is solely for attaching members to the rollbars and for attaching a lateral rollbar to a main rollbar (see Appendix 13 Diagram 11). In this last case, hinged joints in Appendix 13 Diagram 30 to 38 and Diagram 46 must not be used.

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18. Guidance on Welding

18.1. All welding should be of the highest possible quality with full penetration and preferably using a gas shielded arc.

18.2. Although good external appearance of a weld does not necessarily guarantee its quality, poor looking welds are never a sign of good workmanship.

18.3. When using heat-treated steel the instructions of the manufacturer must be followed (special electrodes, gas protected welding).

18.4. It is to be emphasised that the use of heat-treated or medium carbon steels may cause problems and that bad fabrication may result in a decrease in strength (caused by brittle heat-affected zones) or inadequate ductility.

19. Harness Bars

19.1. Minimum dimensions 38mm x 2.5mm or 40mm x 2.0mm. Cold Drawn Seamless Carbon Steel with minimum tensile strength of 350N/mm2. Harness straps may be attached by looping around the tube or by threaded fixings using inserts as drawing No. 44 welded into the tubes(s).

20. Material Specifications 20.1. Specifications of the tubes used:

a.

Material Cold Drawn Seamless Unalloyed Carbon Steel, containing a maximum of 0.3% of carbon.

Note: For an unalloyed carbon steel the maximum content of additives is 1.7% for manganese and 0.6% for other elements. b.

Minimum Yield Strength 350 N/mm2 c. Minimum Dimensions (Ø in mm) i.

Mandatory tubular members 45 x 2.5 (1.75” x 0.095”) or 50 x 2.0 (2.0” x 0.083”) 38 x 2.5 (1.5” x 0.095”) or 40 x 2.0 (1.6” x 0.083”). (For roll cages/bars approved prior to 1.1.95). Optional tubular members 38 x 2.5 (1.5” x 0.095”) or 40 x 2.0 (1.6” x 0.083”).

ii.

20.2. In selecting the steel, attention must be paid to obtaining good elongation properties and adequate weldability.

20.3. The tubing must be bent by a cold working process and the centreline bend radius must be at least three times the tube diameter. If the tubing is ovalised during bending, the ratio of minor to major diameter must be 0.9 or greater.

21. Exceptions

21.1. The only exceptions to the foregoing requirements for Saloon , Single Seater and Sports Cars are as follows:

21.2. ROPS manufacturers may make application to the ASN for a Roll Over Protection System (ROPS) Certificate to be issued.

21.3. Note: ROPS manufacturers wishing to make application for such a certificate should contact the ASN Technical Department in order to obtain details of the requirements to be met and the fees payable. Subject to these requirements being met a ROPS Certificate will be raised and issued. Duly authorised

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copies of this certificate containing a drawing, photographs, a copy of the manufacturers declaration that the ROPS meets the required regulations should be available to Event Scrutineers.

21.4. Each ROPS manufactured after 1.1.97 for which the ASN or the FIA has issued a ROPS (Rollcage) Certificate must bear an identification plate which details the manufacturer and the manufacturer ’s part number allocated to the cage. Details of this identity plate are to be included on the ROPS (Rollcage) Certificate.

Vehicle Categories Covered 22. Series Production, Touring and Sports Cars.

22.1. Production Cars, Touring Cars , Sports cars up to 2,000cc – Basic rollbar / rollcage complying with App.13 Diagram 10 or 11

22.2. Production Cars and Touring Cars over 2,000cc – Rollbar / rollcage complying with App.13 Diagram 12 or 13 .

22.3. Sports Cars over 2,000cc – Rollbar / rollcage complying with Appendix.13 Diagram 12 or 13 or 64.a & 64.b and Diagram 47 .

22.4. The different possibilities of installing the optional reinforcing members to the rollcage are shown in Appendix 13 Diagram 16 to 21.

22.5. Each type of reinforcement ( Appendix 13 Diagram 16 to 21 ) may be used separately or combined with one or several others).

22.6. These reinforcements can be installed in each of the basic rollcages ( Appendix.13 Diagram 10 to 13 ).

Material

22.7. As defined in Art.20 .

22.8. Note: For all the ROPS which are FIA Homologated after 1.1.2000 for Touring Cars the presence of the ROPS in the door aperture must comply with the following criteria (see Appendix 13 Diagram 63 in this section).

22.9. Dimension A must be a minimum of 300mm. 22.10. Dimension B must be a maximum of 250mm. 22.11. Dimension C must be a maximum of 300mm.

22.12. Dimension D (Measured from the upper corner of the windscreen, without the seal) must be a maximum of 100mm.

22.13. Dimension E must not be more than half height of the door aperture.

22.14. ASN Certified and non-Homologated ROPS constructed after 1.1.2001 in accordance with Appendix 13 Diagram 21 must also comply with the above dimensions.

22.15. Vehicles of Periods A-Z as defined within the current FIA yearbook for which a valid FIA Historic Technical Passport (HTP) has been issued – be fitted with a rollbar / rollcage as specified within the HTP issued for each individual Vehicle and with that Vehicle being in compliance with that specification.

23. Sports Racing Cars

23.1. The rollbar must conform to Appendix 13 Diagram 64.a and 47. 23.2. Forward facing stays are permitted for open Sports Racing Cars. 23.3. Minimum height 92cm measured along the line of the driver ’s spine from the bottom of the car seat.

Material

23.4. Cold drawn seamless carbon steel 350N/mm ².

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Minimum Dimensions (mm) 23.5. 45 x 2.5 (1.75in x 0.095in) or 50 x 2.0mm (2.00in x 0.083in).

24. Single Seat Racing Cars

24.1. The rollbar must be symmetrical about the lengthwise centre- line of the car and of minimum height 900mm measured vertically from the base of the cockpit or 920mm measured along the line of the Driver ’s spine from the bottom of the car seat. There must be at least one brace rearwards from the top of the rollbar at an angle not exceeding 60° with the horizontal, this brace must be the same diameter as the rollbar, if two braces are fitted to the tube the diameter may be reduced to 26mm x 2.5mm (1in x 0.095in). Where two braces are fitted, they may be rearward or forward facing.

24.2. The width inside the roll-over bar main tubes must be 380mm minimum measured 600mm above the base of the seat. It must incorporate a crossbrace to restrain the driver ’s head and give rearward support. The top hoop radius must not be less than 100mm measured at the centre line of the tube.

Material

24.3. Cold drawn seamless Carbon steel 350N/mm 2

Minimum dimensions (mm) 24.4. Vehicles up to 470kg:

38 x 2.5 (1.5in x 0.095in) or 40 x 2.0 (1.6in x 0.083in). 24.5. Vehicles 470kg and over

45 x 2.5 (1.75in x 0.095in) or 50 x 2.0 (2.0in x 0.083in).

25. Other Considerations

25.1. An effective rollbar must be fitted with its top edge not less than 50mm above the helmet of the normally seated driver. It must be wider than the driver ’s shoulders at that height. It must be constructed of good quality seamless steel tubing of minimum 35mm diameter and wall thickness of 2mm. It should have the top bar straight or slightly curved but no tubes meeting in an inverted ‘V’. It must be effectively braced to structural members.

25.2. Non-standard Vehicles are advised to fit a rollbar to the following minimum requirements.

a. Minimum height 72cm from the rear of the uncompressed seat cushion. b.

It must have minimum flat width of 38cm running into radiused corners and affording driver and if applicable Passenger equal protection.

c.

It must be effectively mounted and braced to structural members forward and aft of the cockpit and not less than cockpit width.

d.

It must be constructed of good quality seamless steel tubing of minimum 32mm diameter and wall thickness of 1.5mm.

26. ALL aluminium alloy Roll Cages are prohibited.

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CHAPTER 7 COMPETITOR VEHICLES AND VEHICLE SAFETY Appendix 4 - Fuel and Fuel Systems

1. General

1.1. Permitted Fuel All Competitors must use Permitted Fuel (see definition Chapter 8 and Chapter 1 App.1 ) except subject to prior written authority having been given by the ASN where permitted otherwise under Event Official Documents and Championship Regulations.

1.2. Fuel Tanks and Pipes Every effort should be made to isolate fuel tanks and pipes from the Driver / Passenger compartment.

1.3. The risk of fuel spillage from accident damage can be reduced by use of Safety Fuel Cells or by bag type tanks or by coating metal tanks with GRP.

1.4. Tanks should be located so that they are given maximum protection by the structure of the Vehicle.

1.5. Where applicable the entire fuel tank area ‘Licked’ by the open air-stream must incorporate a crushable structure as below.

1.6. Vents should be designed to avoid spillage if the Vehicle becomes inverted. 1.7. Fuel Fillers should be designed and located to reduce risk of damage.

1.8. Filler caps should not be liable to open in the case of an accident. Simple screw caps are effective. The positive locking of the fuel filler cap(s) is recommended.

1.9. The filler pipe to the tank should be of minimum possible length and not protrude beyond the bodywork.

2. Tank Fillers, Vents and Caps

2.1. Tank fillers and caps must not protrude beyond the bodywork or be situated within the Driver / Passenger compartment. The caps must have an efficient locking action to reduce the risk of opening during an accident and to ensure closing after refuelling.

2.2. Air vents must be at least 250mm to the rear of the cockpit and must be designed to prevent the escape of fuel should the Vehicle be inverted. It is recommended that a non-return valve is incorporated in the vent system.

3. Crushable Structure

3.1. The crushable structure should be a sandwich construction based on a fire-resistant core of minimum crushing strength 25lb/sq in. It is permitted to pass water pipes through this core.

3.2. The minimum thickness of the sandwich construction must be 10mm.

3.3. The fore and aft fuel tank area, however, must provide for a crushable structure of at least 100mm thickness at its thickest point and over a length of at least 350mm after which it may be generally reduced to 10mm. The position of this widest point to be at the constructor ’s discretion.

3.4. The sandwich construction must include two sheets of 1.5mm thick aluminium sheet having a tensile strength of 14 tons/sq in and minimum elongation of 5%.

4. Safety Fuel Cells

4.1. The FIA approved standard for Safety Fuel Cells is FIA Standard FT3-1999, FT3.5-1999 and FT5-1999 . Fuel cells complying with this standard are only manufactured by authorised companies and bear the FIA Homologation Label on each cell.

4.2. No other cells are approved by the FIA.

4.3. At International Status Events. Under FIA Regulations the homologation expires once the cell is five years old. The validity of this homologation may be extended for a further two years if the cell is inspected and recertified by the original manufacturer.

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4.4. It is recommended that any safety cell is periodically inspected on a regular basis.

5. Fuel Systems

5.1. Must have any fuel lines passing through the Driver / Passenger compartment protected and, if nonmetallic , to be internally or externally metal braided hydraulic pressure hose or fuel lines complying with FIA specifications.

5.2. Fuel lines may only be joined by screwed sealing joints or vehicle manufacturers approved joint.

5.3. If fitted with fuel fillers in a closed boot, or under closure, have collector / spill trays incorporated to drain outside the Vehicle.

6. Fuel sampling

6.1. With the exception of Vehicles competing in Sprint and Hill Climb Standard Cars and Road Cars Categories , Vehicles competing in British and ASN Titled Championships for, and all Vehicles built after 01 January 2013 for, Rallycross , Car Racing , Special Stage Rallying , Sprints and Hill Climbs must be equipped with the facility to enable a fuel sample to be taken.

6.2. For fuel injected Vehicles the facility must be a dry break fuel sampling coupling, approved by the FIA , Competitors must carry and make available a 300mm minimum length of hose to which, where necessary, the appropriate mating part is to be attached.

6.3. The fuel system must have sufficient fuel for a fuel test ( Chapter 8 ) present at any time during the Event . Breach of this Regulation will give rise to Disqualification (Chapter 2) from the Results of the Event on the principle of a breach of Technical Regulations.

7. Methanol and LPG

7.1. If using Methanol a 70mm diameter ‘Day- Glo’ orange disc must be affixed immediately adjacent to the Competition Numbers on both sides.

7.2. Any Vehicle using methanol must include an ASN-approved additive which provides a distinguishable colour and smell when burning. The maximum permitted volume of additive within the fuel is 0.2%.

7.3. If using LPG, the entire system must conform with Construction and Use Regulations and LPG Industry Technical Association Codes of Practice in force at the date of the Event.

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