Rules and Regulations

Contents

  1. General Regulations
    2.
    1. Preamble
      2.
    2. General
      3.
  2. Group Na - Production Touring Cars (Pre-1958)
    3.
    1. Eligibility
      2.
    2. Body
      3.
    3. Permitted Modifications
      4.
    4. Safety Requirements
      5.
    5. Advertising
      6.
  3. Group Nb - Touring Cars (Pre-1965)
    4.
    1. Eligibility
      2.
    2. Body
      3.
    3. Permitted Modifications
      4.
    4. Safety Requirements
      5.
    5. General
      6.
    6. Advertising
      7.
    7. Spirit of Regulations
      8.
  4. Group Nc - Touring Cars (1965-1972)
    5.
    1. Eligibility
      2.
    2. Body
      3.
    3. Permitted Modifications
      4.
    4. Safety Requirements
      5.
    5. Advertising
      6.
    6. Spirit of Regulations
      7.

General Regulations
  1. Preamble
    2.
    1. The following definitions and general requirements governing Historic Cars have been adopted to facilitate the organisation of competitions and meetings in which such vehicles are involved.
    2. Events for vehicles within the 5th Category may be programmed to cater for:
      • group racing: specific individual groups within the category; or
      • combined group racing: a combination of several specific individual groups; or
      • divisional racing: a combination of vehicles from any of the individual groups with eligible vehicles selected on the basis of their perceived compatibility in performance potential. Any number of events of this type may be programmed at any one meeting to divide the overall entry into compatible performance divisions.

      Engine capacity classes may be incorporated in any of these types of events or an overall engine capacity limitation placed on any event. It would generally be preferred that any engine capacity limitations selected be consistent with those commonly in use during the relevant period.No specific limitations are imposed on vehicle combinations which will be permitted in combined group or divisional events but fields should consist of vehicles which are generally compatible in performance potential.CAMS will hold the absolute discretion to disallow any proposed vehicle combinations which it considers might create safety hazards arising from speed differentials or visibility problems. It would for example not generally be appropriate to combine events for Groups P and Q with those for earlier vehicles because of the speed differential involved or to combine events for Group Na, Nb or Nc with other groups because of speed differentials.Within any group or combined group event, it will be permissible to include by invitation individual vehicles from other groups where such action is considered desirable to achieve the most performance-compatible field. Where such action is taken notation should be made in the program to record the subject vehicles’ correct group classification and the event should be described in the program as including vehicles from other groups by invitation.When programming combined group or divisional racing events, consultation with the state member of the Historic Commission or Historic Eligibility Committee is encouraged to assist determination of the most compatible mix of vehicles.

    3. The express purpose of these regulations is to ensure that vehicles in the various groups compete in a condition, mechanically and visually, compatible with the period of racing being portrayed. “Updating” in whatever form is not condoned. CAMS reserves the right to reject any vehicle which it considers not within the spirit of these regulations. Vehicles must conform with the appropriate group date specification in concept and in detail. Where any doubt exists between Historic regulations and the original period specification, the latter will take precedence.
    4. CAMS in its absolute discretion reserves the right to accept or reject any vehicle for Historic classification. The issue of all log books must be firstly authorised by the Historic Eligibility Committee through CAMS National Office. A central register of Historic vehicles in all groups is maintained, and the issue of all Historic log books is carried out through CAMS National Office. All new Historic Vehicle Log Books being issued are accompanied by an Historic Certificate of Description which is a Recognition Certificate for the vehicle concerned.A Temporary Permit to Compete may be issued at the sole discretion of CAMS, in circumstances where a vehicle is visiting temporarily from outside of Australia, and otherwise at the sole discretion of CAMS.(Competitors should be aware of the requirements of Schedule L - Vehicle Log Books.)
    5. CAMS reserves the right to classify, withdraw classification, or re-classify a vehicle to a group which in its absolute discretion CAMS believes it conceptually belongs.
    6. Before commencing construction of a special or the acquisition and/or restoration of a vehicle, it is most advisable that CAMS National Office or the State Historic Eligibility Officer be contacted regarding eligibility of the said vehicle.
    7. CAMS may approve re-creation of significant vehicles which have been destroyed under the following conditions:
      • there may be only one re-creation;
      • CAMS must approve in principle vehicles prior to the commencement of the project. It should be noted that this does not in itself guarantee the acceptance of the vehicle which shall always be the subject of inspection and approval by CAMS when completed;
      • there must be justification for the project, ie, it must be a significant vehicle, and only a faithful re-creation will be considered.
    8. Three-wheeled vehicles participating in events exclusively for Historic vehicles are exempted from NCR 12
    9. The original style of paintwork and livery is encouraged. The name of the driver may be shown on the vehicle, appearing once on either side in a position below the window line, in a size not larger than 40mm by 300mm.A club badge, of an acceptable motoring club, can appear on the vehicle. Each badge must be not larger than 150mm by 100mm and must be placed below the window line. Only two such badges are permitted.The territory of origin of the driver may be shown on the vehicle. Each sign must be not larger than 100mm by 150mm and must be placed below the window line. Only two such signs are permitted, one on each side of the vehicle.No other advertising material or sign is permitted unless evident in the applicable group period. (See relevant Group Articles.)
    10. Additional information and advice is provided in the Guide to Historic Racing which is available from CAMS National or State Offices.
  2. General
    3.
    1. Log Books:

      2. The production of a properly entered Historic vehicle log book issued by CAMS is required by NCR 150.

      Vehicles in all Historic groups are to comply with the requirement of Schedule L – Vehicle Log Books. In addition:

      Vehicle Log Books must be endorsed for the 5th Category and/or titled “Historic Vehicle Log Book”, and

      Vehicles must comply with their Certificate of Description (where such a document has been issued), such Certificate of Description being a Recognition Certificate referred to in Schedule L.

    2. A Temporary Permit to Compete:

      3. A Temporary Permit to Compete, specific to the 5th Category – Historic Cars, issued by CAMS is acceptable as an alternative to the possession of an Historic Vehicle Log Book as defined in 2.1 above.

    3. Safety:

      Vehicles in all Historic groups - while competing in events specifically limited to such vehicles - are exempted from CAMS requirements in respect of fire extinguishing systems (but not fire extinguishers) (refer Schedule H), scatter shields, roll bars (except Groups Na, Nb, Nc and Sc), safety-harness, minimum bodywork, towing eyes, firewalls (although the fitment of these devices is in some cases desirable), starter motors, reverse gears and safety fuel tanks.

      These exemptions will not be applicable to any vehicle which was originally equipped with any of the above mentioned equipment or design features.

      Vehicles using alcohol fuels must carry a CAMS-approved fire extinguisher, applicable for use on an alcohol fire.

      All tanks equipped with a quick-release filler cap shall have a secondary locking device or be wired shut.

      CAMS recommends that competitors wear an approved full-face helmet when driving in open vehicles (refer Schedule D).

      Concerning roll bars, Historic vehicles (except Groups Na, Nb and Nc), are subject to the following possibilities:

      • no roll bar (unless the vehicle was originally equipped with one); or
      • a roll bar to the group period specifications; or
      • a roll bar complying with Schedule J; or
      • a roll bar specifically approved by CAMS.
    4. Fuel:

      5. The specific requirements for each group will be found in the relevant Regulations. It is mandatory that vehicles using alcohol fuels (where permitted) also carry a symbol in the form of the letter “A” in white on a red circle of approximately 115mm diameter with a white border. This symbol must be placed adjacent to the racing number on each side of the vehicle, and at the fuel filler cap.

    5. Terminology:

      6. The term “style”, where used in relation to wheels, refers to Sankey, wire, cast steel centre etc.

      By “original” is meant a component which is in all respects identically similar to that originally fitted, as produced by the manufacturer who produced the original component/s, and is indistinguishable from it in all respects.

      By “period” is meant the applicable group period of the vehicle in question.

    6. Supercharging:

      7. Vehicles in this category fitted with superchargers are not subject to the 1.7 factor as to displacement.

    7. Competition Numbers:

      8. Groups J, K, Lb & Lc are exempted from the requirements as to background specified in Schedule K. Applications for exemption may be made in individual cases for other vehicles where the specified vehicle competed in such visual form during the group period.

Group Na - Production Touring Cars (Pre-1958)

Group Na is designed to provide a forum for competitors to race pre-war production touring cars and early post-war production touring cars in a form similar to club racing of the period. To this extent, the modifications permitted are those that are not intended to radically alter the individual vehicleÕs character or appearance and will be of an improved performance road car nature, as opposed to making the vehicle totally dedicated to outright competition; the concept being that the vehicles could be driven comfortably to and from the race meeting.

An important consideration in forming these Regulations was the need to provide eligibility rules which will require a minimum of administration, particularly at race meetings.

People wishing to race vehicles of a more highly-modified nature should look to other categories.

  1. Eligibility
    2.
    1. Production touring cars as recognised by CAMS, commercially available in Australia prior to 31 December, 1957, with the inclusion of certain run-on models. The vehicles must be of a touring form providing adequate normal seating for four or more adult persons. Vehicles classified in this group will not necessarily have a racing history. Factory-built competition variants of standard production vehicles or GT-type vehicles are not eligible for this Group.
    2. Classes:

      3. Vehicles shall compete in the following capacity classes:

      • Up to 1100cc
      • 1101 - 1500cc
      • 1501 - 3000cc
      • 3001cc and over

      Limited modifications may be made. These should be of a period nature and not out of character with the vehicle or group period.

    3. Eligible Vehicles:

      4. A list of vehicles eligible for this group will be published by CAMS from time to time.

    4. Specifications:

      5. Individual specifications will be produced for each type of vehicle, determining its specifications and allowable modifications.

  2. Body
    3.
    1. Bodywork:

      2. The bodywork, body fittings and interior trim in its entirety must be supplied by the manufacturer save that wheel nave plates must be removed. Bumper bars must be retained.

    2. Cockpit:

      3. The cockpit must be original save that floor coverings may be removed. The steering wheel may be replaced by another of the period style but the rear seat must be retained in all respects including location.

      Vehicles must be fitted with original-type or CAMS-approved seats (refer to page 8-28). Some extra padding is allowed. Seats must be trimmed in the same, matching or complementary colours as other trim on the vehicle.

      Original instruments must be intact. Additional instruments of a period type may be fitted. Electronic tachometers may be substituted for mechanically-driven units, provided they are compatible in face, style and size with the other instruments.

    3. Chassis:

      4. Chassis or chassis-body unit must be original and unmodified.

  3. Permitted Modifications
    4.

    Mechanical modifications may be made, provided that the following restrictions are observed:

    1. Engine:
      • Cylinder block and head must be original, or a CAMS-approved alternative.
      • Internal components of the engine are free save that the crankshaft stroke must be original.
      • The cylinder bore may be increased by a maximum of 1.5mm beyond original dimension.
      • Cylinder head/s may be modified provided such modification is effected only by the removal of metal.
      • Toothed belt drives are not permitted.
      • Dry sump lubrication is not permitted, unless originally fitted.
      • The exhaust system is free but should be of a type compatible with the period.
      • The cooling system must remain as standard, save that the radiator core is free as to thickness. Electric fans may be added.
    2. Induction:

      3. Carburettors or fuel injection systems must be of the make and model originally available in the period. Bore size is free. Superchargers are not permitted unless part of the original specification. Multiple carburettors may be fitted in the ratio of one choke per two cylinders.

      Inlet manifolds are free except that they must be of a type compatible with the period.

    3. Transmission:

      4. Gearbox casing, gear selection mechanism and the number of forward ratios must be original. Internal components are otherwise free.

      External components of the final drive assembly must be unmodified from the original specification. Internal components are free. Limited slip or locked differential are not allowed unless part of original specification.

    4. Brakes:

      5. The original form and type of braking system shall be employed. The major brake dimensions of drum brakes (ie, internal drum diameter and width) shall be as supplied as original equipment with a tolerance of 3mm permitted on drum diameter. Backing plates may be ventilated and/or fitted with cooling ducts.

      Mechanical operation may be converted to hydraulic operation.

      In the case of disc brake systems, the brake discs and callipers must be original.

      Drum brakes may not be replaced by disc brakes. Dual or tandem master cylinders may be fitted. The installation of power brake assistance is permitted.

    5. Suspension:

      6. The suspension must be unmodified from original specifications, save that spring rates, ride height and damper settings may be altered.

      Suspension pickup points may not be modified. Eccentric or modified suspension components that alter the dimensions or geometry from original specifications are not permitted. Externally adjustable shock absorbers are not permitted.

      Fore and aft axle location may be improved but transverse location may not be altered.

      Fitment of period-type anti-sway bar to the front suspension is permitted.

      Spherical or ÒRoseÓ type joints are not permitted.

    6. Wheels and Tyres:

      7. Wheels are required to be original in diameter and style (ie, steel wheels may not be replaced by alloy wheels). Rim width may not exceed 5Ó unless originally specified by the manufacturer; in which case the rim width must be as originally supplied.

      Tyres must have an aspect ratio of at least 65 percent as determined by the Tyre and Rim Association manual. (Refer Na, Nb, Nc, Sa, Sb and Sc Tyre List, page 8-30.)

    7. Electrical Equipment:

      8. All electrical equipment must be unmodified from the original specifications and fully operative. The dynamo/generator may not be replaced by an alternator. Electronic ignition devices are not permitted.

  4. Safety Requirements
    5.
    1. Vehicles shall comply with all relevant requirements of Schedules A, B and C.
    2. A laminated windscreen is required in races and in multiple speed events. However, in the event that a laminated screen is unavailable, approval may be given on individual application to CAMS for the fitment of a Lexan or Perspex windscreen.
    3. CAMS-approved rollover protection and seat belts are compulsory. A roll bar or half cage conforming with Schedule J (Type 3 or Type 4) is required to be fitted to all vehicles. Roll cages are allowed. Side intrusion bars and other additional braces are permitted provided they do not pass through any part of the bodywork. Roll bar assemblies must not be installed so as to become a de facto chassis used to improve the torsional or beam strength of the original chassis. Head rests are strongly recommended but must be supported by the same structure that supports the driver's seat.
    4. Foam-filled flexible fuel tanks are strongly recommended.
  5. Advertising
    6.

    No advertising material or sign will be distributed from or carried on any vehicle in this category provided that this rule shall not apply to the manufacturerÕs usual name plate. CAMS reserves the right to permit also the display - in neat, unobtrusive lettering - of the name of the entrant and/or the driver and/or the State of his residence on the scuttle or the side of the vehicle. The total area of all such signs shall not exceed 75mm in height and 600mm in length on each side of the vehicle.

    Club badges of an acceptable motoring club may appear on the vehicle. Each badge must be not larger than 150mm by 100mm and must be placed below the window line. Only two such badges are permitted.

    The territory of origin of the driver may be shown on the vehicle. Each sign must be not larger than 100mm by 150mm and must be placed below the window line. Only two such signs are permitted.

    No other signs may be displayed.

Group Nb - Touring Cars (Pre-1965)
  1. Body
    2.
    1. The body must be of a touring hard-top form, and must provide adequate normal seating accommodation for four or more adults.
    2. Vehicles in the above-mentioned Classes A, B, C, D, and E must have four doors unless they have been homologated by the FIA,or are otherwise specifically approved by CAMS, in a two-door version. Vehicles in Classes F and G must have at least two doors.
    3. The bodywork, body fittings and interior trim in its entirety must be as supplied by the manufacturer except only that wheel nave plates must be removed, additional instruments fitted and the steering wheel replaced: provided that the replacement wheel is not less than 330mm in diameter (unless the original wheel was of a lesser diameter, in which case a replacement of at least equal diameter to the original is acceptable).
    4. The use of undertrays, fairings etc, designed to improve the aerodynamic form of the automobile shall not be permissible unless supplied as standard equipment.
    5. The original rear seats must be retained in all respects, including location.

      6. The driver's seat may be replaced with a CAMS-approved driving seat.

      The original passenger seat must remain in place - see Schedule C of Section 6. Such seats must be trimmed in the same, matching, or complementary colours as other trim on the vehicle.

      On vehicles fitted with a bench front seat as original equipment, the whole seat may be removed, and the passenger seat must be a bucket seat from, eg, a comparable Falcon Futura, Holden Premier etc. If the original equipment bench seat is retained, modification of the driver's portion of that seat is free so long as the origin of the seat may be determined.

    6. Restoration of original trim is permitted, but should be as near as practicable to original specifications. Floor coverings may be removed. Insulating material may be added.
  2. Permitted Modifications
    3.

    Mechanical modifications may be made, provided that the following restrictions are observed:

    1. Engine:
      • The original type of cylinder block and crankcase must be employed. The bore may be varied and/or the stroke reduced provided that the swept volume of the engine remains within the same cubic capacity class as that within which the engine came as supplied by the manufacturer (eg, EH Holden under 3000cc, Morris Cooper S under 1300cc).
      • The original type of cylinder-head casting must be employed. The cylinder-head may be modified provided that such modification is effected only by the removal of metal.
      • A dry sump is not permitted unless fitted as original equipment on the make and model of the vehicle of the period.
      • The radiator cooling fan may be removed; electrically powered fans are permitted.
    2. Induction:

      3. Forced induction or fuel injection is not permitted, unless such induction method was employed as standard on the make and model of vehicle by the manufacturer concerned.

      Later models of carburettors which were available in the period are acceptable, even with different throat sizes, provided that the outward appearance is the same.

      Carburettors of a make not available in the period are unacceptable.

    3. Transmission:

      4. The original type of gearbox and final drive assemblies including housings as supplied by the manufacturer for the make and model concerned shall be employed. The final drive assembly is otherwise free, save that the original housing must be retained (although it may be subject to any machining operations provided always that its origin is able to be established).

      The number of gear ratios may not be changed.

    4. Suspension:

      5. The original form and type of suspension only shall be employed (eg, a semi-elliptic leaf-spring suspended live rear-axle may not be replaced by a coil-spring suspended De Dion type, and so on).

      At all times, the original form of steering and suspension joints must be employed, and in particular, may not be replaced by spherical or Rose type joints.

    5. Brakes:

      6. The original form and type of brake system shall be employed (eg, drum brakes may not be replaced by disc brakes). The major brake dimensions (ie, internal drum diameter and width) shall be identical with the dimensions of these components as supplied as original equipment by the manufacturer concerned; provided that overall variation in the diameter of such drums of not more than 3mm shall be permissible. Modifications to disc brakes are limited to the freedom to fit alternative callipers of a type available pre-1965. Dual circuit braking systems are permitted, as is installation of power brake assistance. Brake lining material and hoses are free.

    6. Wheels and Tyres:

      7. The wheels shall be either as supplied by the manufacturer or of a type approved by CAMS and which is in harmony with wheels used prior to 31 December, 1964. At all times the original wheel diameter shall be maintained, and the width of the rim may be increased by not more than 1Ó over the original, subject to an absolute maximum width of 6Ó. Aluminium alloy type wheels may be fitted, but only of a design and style available prior to 31 December, 1964. Mudguard flares or extensions are not permitted unless they were fitted as original equipment by the manufacturer.

      Tyres may not protrude outside the bodywork, but otherwise track is free.

      Tyres must be of an approved type of radial or cross-ply construction with a minimum aspect ratio of 60 percent as determined by the Tyre and Rim Association. (Refer Na, Nb, Nc, Sa, Sb and Sc Tyre List, page 8-30.)

  3. Safety Requirements
    4.
    1. A laminated windscreen is required in all vehicles. However, in the event that a laminated screen is unavailable, approval may be given on individual application to CAMS for the fitment of a Lexan or Perspex windscreen.
    2. A roll bar or cage conforming with Schedule J (Type 4 or 5) is required to be fitted in all vehicles. Side intrusion bars and other additional braces are permitted provided they do not pass through any part of the bodywork. The roll bar or cage must not be used as a means of increasing the structural strength of the vehicle.
    3. Foam filling of fuel tanks is permitted. The fuel tank may not be moved from its original location.
  4. General
    5.
    1. The vehicle shall be required to comply with such requirements of Schedules A, B and C as are applicable and not in conflict with this Group.
    2. Electrical equipment in conformity with the requirements of Group 2A is required to be fitted.
    3. A high standard of presentation will be insisted upon at all times. Any vehicle considered to be of inappropriate standard will be rejected.
    4. At all times, the onus of proof of eligibility of the vehicle and/or components whether options or not, will be the responsibility of the owner, by way of homologation papers, parts manuals, workshop manuals etc. In marginal cases, proof may be required to be produced to the effect that a vehicle of the same model was produced prior to 31 December, 1964.
  5. Advertising
    6.

    No advertising material or sign will be distributed from or carried on any vehicle in this category provided that this rule shall not apply to the manufacturerÕs usual name plate. CAMS reserves the right to permit also the display - in neat, unobtrusive lettering - of the name of the entrant and/or the driver and/or the State of his residence on the scuttle or the side of the vehicle. The total area of all such signs shall not exceed 75mm in height and 600mm in length on each side of the vehicle.

    Club badges of an acceptable motoring club may appear on the vehicle. Each badge must be not larger than 150mm by 100mm and must be placed below the window line. Only two such badges are permitted.

    The territory of origin of the driver may be shown on the vehicle. Each sign must be not larger than 100mm by 150mm and must be placed below the window line. Only two such signs are permitted.

    No other signs may be displayed.

  6. Spirit of Regulations
    7.

    It is emphasised that the purpose of this category of racing is to emulate, as far as is practicable, racing of touring cars under Appendix J regulations which were current until 31 December, 1964. Under the spirit of these regulations, over-restoration of vehicles, including the use of technology, parts or equipment not available within the period in question, are not acceptable and will render the vehicle ineligible. The Historic Eligibility Committee will interpret these regulations and determine any eligibility matters relating thereto in accordance with this spirit.

Group Nc - Touring Cars (1965-1972)

Group Nc is an historic group introduced on 1 January, 1995, to cater primarily for vehicles of a make and model which competed in Australia between 1 January, 1965, and 31 December, 1972 in either the Australian Touring Car championship and in races specifically for 3rd Category Group C Improved Production Touring Cars.

During the 1965-1972 period the rules for the vehicles evolved significantly, therefore the Group Nc rules have been established to enable competition under a common set of rules which reflect the nature of top-level car racing in the period.

It is envisaged that most vehicles in this class will not have a racing history and these are acceptable provided they are accurate in detail both mechanically and visually. Vehicles with a racing history may be presented in the most predominant form in which they were raced in the period, including the original sponsor signage, even though this specification may not fully conform with these rules.

A list of eligible vehicles and vehicle specification sheets for the more popular models are under preparation and will be available from CAMS.

  1. Eligibility
    2.
    1. Touring Cars of a make and model which competed in Australia between 1 January, 1965 and 31 December, 1972 in either the Australian Touring Car Championship or in races specifically for 3rd Category Group C Improved Touring Cars.
    2. Vehicles shall compete in the following capacity classes:
      • Class E Up to 1500cc
      • Class D 1501cc - 2000cc
      • Class C 2001cc - 3500cc
      • Class B 3501cc - 5000cc
      • Class A Over 5001cc
    3. Owners of recognised vehicles with a competition history during the period are encouraged to present the vehicle in its original format evident at a given point in its history. Historic precedence will prevail over the following regulations with regard to these vehicles. Proof of this precedence falls to the owner and acceptance of it is at the absolute discretion of CAMS.
    4. For a vehicle to be constructed, approval must be given by CAMS. The applicant must provide proof that the particular make and model competed in races described in 1.1 above.
    5. A comprehensive detailed specification of each make and model and the permitted modifications for that vehicle will be provided upon approval for construction being granted by CAMS.
  2. Body
    3.

    The bodywork, fittings and interior trim in its entirety must be as supplied by the manufacturer.

    1. Body Modifications:

      2. Body modifications may be made, provided that the following restrictions are observed:

      • The inner lip of the wheel opening may be folded back for tyre clearance.
      • Mudguard extensions may be used if homologated.
      • The driver's seat may be replaced with a CAMS-approved racing seat.
      • The steering wheel may be replaced with a sports steering wheel of 330mm minimum diameter.
      • Floor coverings may be removed.
      • The use of under trays, fairings etc designed to improve the aerodynamic form of the vehicle are not permitted unless supplied as standard equipment for the make and model.
      • If brake cooling ducts or scoops are fitted, they must be separated by a minimum of 300mm, so as not to form an aerodynamic aid and their sole function shall be to assist in the supply of air to the brakes.
      • Additional instruments may be added providing all original instruments and switches remain intact and that additional equipment is fitted to a separate panel.
  3. Permitted Modifications
    4.
    1. Engine:

      2. Mechanical modifications are permitted subject to the following restrictions:

      • The original type and design of cylinder block and crank case must be employed. The bore may be increased to a maximum of 1.5mm, the stroke must remain standard as specified for the make and model.
      • Dry sump lubrication systems are not permitted unless fitted as original equipment (lubrication may be modified and additional cooling provided).
      • The original type and design of cylinder head casting must be employed; it may be modified provided that such modification is achieved only by the removal of metal.
      • Electronic ignition devices are not permitted unless fitted as original equipment.
    2. Induction:

      3. Fuel injection is not permitted unless fitted as original equipment.

      Carburettors of a make and model not available during the period are not permitted.

    3. Transmission:

      4. The original type and design of transmission and drive train assemblies including the number of forward and reverse ratios, assembled and operating as originally supplied by the manufacturer shall be retained. The use of alternate ratios is permitted. Any form of locking differential is permitted. Fully floating hubs are permitted. The gear lever may be modified but the original shift pattern must be retained.

    4. Suspension:

      5. The original configuration of suspension whether by leaf spring, coil spring, torsion bar, air, rubber etc for the make and model must be retained. The following modifications are permitted:

      • Modifications to ride height are free; shock absorbers are free.
      • Additional control arms and equipment may be added but must not override the original component function.
      • Spherical joints may not be used to replace existing components.
      • The original wheelbase dimensions must be retained. The track may be increased by not more than 50mm.
    5. Brakes:

      6. The original form and type of braking system must be employed, eg disc/drum.

      Components may be replaced with those from another model from the same vehicle manufacturer produced before 31 December, 1972, provided there is no increase in the swept area of the disc or drum. Dual/tandem master cylinders may be used. Brake bias must not be adjustable from the driver's compartment.

    6. Wheels and Tyres:

      7. Wheels may be replaced with period style alloy wheels. Maximum rim width permitted is:

      • Class A and B maximum 8 inches
      • Class C and D maximum 7 inches
      • Class E maximum 6 inches

      The same diameter wheels must be those used on the model during the group period. Tyres must be of approved tyre radial or cross-ply construction with a minimum aspect ration of 60 percent as determined by the Tyre and Rim Association. (Refer Na, Nb, Nc, Sa, Sb and Sc tyre list, page 8-30).

    7. Cooling System:

      8. The radiator may be replaced but must retain its original location and support panel opening. The radiator cooling fan may be removed. An electric fan may be fitted.

    8. Fuel Tank:

      9. The fuel tank may be foam-filled or replaced with a tank of the same dimensions and capacity to the same location.

  4. Safety Requirements
    5.
    1. A laminated windscreen is required to be fitted in all vehicles.
    2. A roll cage conforming with Schedule J is required to be fitted in all vehicles. Side intrusion bars and other additional braces are permitted provided they do not pass through any part of the bodywork. The roll cage must not be used as a means of increasing the structural strength of the vehicle.
    3. Foam filling of fuel tanks is permitted. The fuel tank may not be moved from its original location.
  5. Advertising
    6.

    No advertising material or sign may be distributed from or carried on any vehicle in this category provided that this rule shall not apply to the manufacturerÕs usual name plate. CAMS reserves the right to permit also the display - in neat, unobtrusive lettering - of the name of the entrant and/or the driver and/or the State of his residence on the scuttle or the side of the vehicle. The total area of all such signs shall not exceed 75mm in height and 600mm in length on each side of the vehicle.

    Club badges of an acceptable motoring club can appear on the vehicle. Each badge must be not larger than 150mm by 100mm and must be placed below the window line. Only two such badges are permitted.

    The territory of origin of the driver may be shown on the vehicle. Each sign must be not larger than 100mm by 150mm and must be placed below the window line. Only two such signs are permitted.

    No other signs may be displayed.

  6. Spirit of Regulations
    7.

    It is emphasised that the purpose of this category is to emulate, as far as practicable, the racing of touring cars in the period from 1 January, 1965 to 31 December, 1972. Under the spirit of these regulations, over-restoration of vehicles, including the use of technology, parts or equipment not available within the period in question, are not acceptable and will render the vehicle ineligible. The Historic Eligibility Committee will interpret these regulations and determine any eligibility matters relating thereto in accordance with that spirit.