GCC STANDARDIZATION ORGANIZATION (GSO)  
 
 
 
 
 
 
 
 
 
GSO 2/FDS /  ECE -13H: 2009  
ECE -13H: 200 8 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
السيارات- نظامِ  مكابح سياراتِ  الركوبِ  والسيارات متعددة الأغراض  
 
Motor Vehicles: Braking System of Passenger Cars and Multi 
Purpose Vehicles  
 2 
 
 
 
2
1
ECE -13H: 2006
  
 
ECE -13H: 2006
 
 
Foreword  
 
GCC Standardization Organization (GSO) is a regional Organization which 
consists of the National Standards Bodies of GCC member States. One of GSO 
main functions is to issue Gulf Standards /Technical regulation s through 
specialized technical committees (TCs).  
 
GSO through the technical program of committee TC No 2 /1 "The Gulf technical 
Subcommittee for vehicles and tyres standards  "has updated the GSO Standard 
No. : ECE -13H: 2006 " Motor Vehicles: Braking System o f Passenger Cars and 
Multi Purpose Vehicles  "in its original language. The Draft Standard has been 
prepared by (State of Qatar)  
  
This standard has been approved in its original language without any technical 
modifications as a Gulf Standard by GSO Board of Directors  in its meeting No. 
(       ), held on      /    /            H,     /     /              G. The approved standard will 
replace and supersede the GSO standard No. :  ECE -13H: 2006  
  
 3 
 MOTOR VEHICLES  
BRAKING SYSTEM OF PASSENGER CARS  
AND MULTI -PURPOSE VEHICLES  
 
1-            SCOPE AND FIELD OF APPLICATION  
 
This Gulf standard is concerned with the braking system of passenger cars and  
multi -purpose vehicles of categories M1 and N1 ;  it does not cover  vehicles 
with a design speed not exceedi ng 25 km/h  and vehicles fitted for invalid 
drivers  ; 
 
2-           COMPLEMENTARY REFERENCES  
 
2.1                  GSO ECE 13H -1:200 9 “Motor Vehicle s – Methods of Test for Braking System  
                      Part 1 : Braking  Performance”.  
2.2                  GSO ECE 13H -2:200 9 “Motor Vehicles – Methods of Test for Braking System  
                     Part 2 : Determination  of Capacity of Energy Storage Devices”.  
2.3                  GSO ECE 13H -3:200 9 “Motor Vehicles – Methods of Test for Braking System  
                       Part 3: Determination of Distribution of Braking Among the Axles of Vehicles”.  
2.4                  GSO ECE 13H -4:200 9“Motor Vehicles – Methods of Test for Braking System  
                     Part 4: Determination of Function of Antilock Systems”.  
2.5                  GSO ECE 13H -5:200 9“Motor Vehicles – Methods of Test for Braking System  
                      Part 5: Determination of Performance of Brake Lining Using Inertia    
Dynamometer”.  
2.6                  GSO ECE 13H -6:200 9“Motor Vehicles – Methods of Test for Braking System  
                     Part 6: Determination of Coefficient of Adhesion ". 
 
3. DEFINITIONS  
 
 For the purposes of this Regulation,  
 
3.1. "Approval of a vehicle " means the approval of a vehicle type with regard to 
braking.  
 
3.2. "Vehicle type " means a category of vehicles which do not differ in such 
essential respects as:  
 
3.2.1. The maximum mass, as defined in paragraph 3.11. below;  
 
3.2.2. The distribution of mass among the axles;  
 4 
 3.2.3. The maximum design speed;  
 
3.2.4. A different type of braking equipment, with more particular reference to the 
presence or otherwise of equipment for braking a trailer or any presence of 
electric braking syste m; 
 
3.2.5. The engine type;  
 
3.2.6. The number and ratios of gears;  
 
3.2.7. The final drive ratios;  
 
3.2.8. The tyre dimensions.  
 
3.3. "Braking equipment " means the combination of parts whose function is 
progressively to reduce the speed of a moving vehicl e or bring it to a halt, or to 
keep it stationary if it is already halted; these functions are specified in 
paragraph  6.1.2. below.  The equipment consists of the control, the 
transmission, and the brake proper.  
 
3.4. "Control " means the part actuated dire ctly by the driver to furnish to the 
transmission the energy required for braking or controlling it.  This energy may 
be the muscular energy of the driver, or energy from another source controlled 
by the driver, or a combination of these various kinds of e nergy.  
 
3.5. "Transmission " means the combination of components comprised between the 
control and the brake and linking them functionally.  The transmission may be 
mechanical, hydraulic, pneumatic, electric or mixed.  Where the braking power 
is derived fro m or assisted by a source of energy independent of the driver, the 
reserve of energy in the system is likewise part of the transmission.  
 
 The transmission is divided into two independent functions: the control 
transmission and the energy transmission.  Wh enever the term "transmission" 
is used alone in this Regulation, it means both the "control transmission" and 
the "energy transmission":  
 
3.5.1. "Control transmission " means the combination of the components of the 
transmission which control the operation of the brakes, including the control 
function and the necessary reserve(s) of energy;  
 
3.5.2. "Energy transmission " means the combination of the components which supply 
to the brakes the necessary energy for their function, including the reserve(s) of 
energy necessary for the operation of the brakes.  
 5 
 3.6. "Brake " means the part in which the forces opposing the movement of the 
vehicle develop.  It may be a friction brake (when the forces are generated by 
friction between two parts of the vehicle moving rela tively to one another); an 
electrical brake (when the forces are generated by electro -magnetic action 
between two parts of the vehicle moving relatively to but not in contact with 
one another); a fluid brake (when the forces are generated by the action of a 
fluid situated between two parts of the vehicle moving relatively to one 
another); or an engine brake (when the forces are derived from an artificial 
increase in the braking action, transmitted to the wheels, of the engine).  
 
3.7. "Different types of bra king equipment " means equipment which differs  in such 
essential respects as:  
 
3.7.1. Components  having different characteristics;  
 
3.7.2. A component made of materials having different characteristics, or a 
component differing in shape or size;  
 
3.7.3. A different assembly of the components.  
 
3.8. "Component of the braking equipment " means one of the individual parts 
which, when assembled, constitutes the braking equipment.  
 
3.9. "Progressive and graduated braking " means braking during which, within the 
normal operating range of the device, and during actuation of the brakes (see 
paragraph 3.16. below):  
 
3.9.1. The driver can at any moment increase or decrease the braking force by acting 
on the control;  
 
3.9.2. The braking force varies proportionally as th e action on the control (monotonic 
function);  
 
3.9.3. The braking force can be easily regulated with sufficient precision.  
 
3.10. "Laden vehicle " means, except where otherwise stated, a vehicle so laden as to 
attain its "maximum mass".  
 
3.11. "Maximum mass " means the maximum mass stated by the vehicle 
manufacturer to be technically permissible (this mass may be higher than the 
"permissible maximum mass" laid down by the national administration).  
 
3.12. "The distribution of mass among the axles " means the di stribution of the effect 
of the gravity on the mass of the vehicle and/or its contents among the axles.  6 
  
3.13. "Wheel/axle load " means the vertical static reaction (force) of the road surface 
in the contact area on the wheel/wheels of the axle.  
 
3.14. "Maximum stationary wheel/axle load " means the stationary wheel/axle load 
achieved under the condition of the laden vehicle.  
 
3.15. "Hydraulic braking equipment with stored energy " means a braking equipment 
where energy is supplied by a hydraulic fluid under p ressure, stored in one or 
more accumulator(s) fed from one or more pressure pump(s), each fitted with a 
means of limiting the pressure to a maximum value.  This value shall be 
specified by the manufacturer.  
 
3.16. "Actuation " means both application and rel ease of the control.  
 
3.17. "Electric regenerative braking " means a braking system which, during 
deceleration, provides for the conversion of vehicle kinetic energy into 
electrical energy.  
 
3.17.1.  "Electric regenerative braking control " means a device whi ch modulates the 
action of the electric regenerative braking system;  
 
3.17.2.  "Electric regenerative braking system of category A " means an electric 
regenerative braking system which is not part of the service braking system;  
 
3.17.3.  "Electric regenerativ e braking system of category B " means an electric 
regenerative braking system which is part of the service braking system;  
 
3.17.4.  "Electric state of charge " means the instantaneous ratio of electric quantity of 
energy stored in the traction battery relat ive to the maximum quantity of 
electric energy which could be stored in this battery;  
 
3.17.5.  "Traction battery " means an assembly of accumulators constituting the storage 
of energy used for powering the traction motor(s) of the vehicle.  
 
3.18. "Phased br aking " is a means which may be used where two or more sources of 
braking are operated from a common control, whereby one source may be 
given priority by phasing back the other source(s) so as to make increased 
control movement necessary before they begin t o be brought into operation.  
 
3.19. "Nominal value " definitions for braking reference performance are required to 
put a value on the transfer function of the braking system, relating output to 
input for vehicles individually.  
 7 
 3.19.1.  "Nominal value " is defined as the characteristic which can be demonstrated at 
type approval and which relates the braking rate of the vehicle on its own to 
the level of the braking input variable.  
 
3.20. "Automatically commanded braking " means a function within a complex 
electronic control system where actuation of the braking system(s) or brakes of 
certain axles is made for the purpose of generating vehicle retardation with or 
without a direct action of the driver, resulting from the automatic evaluation of 
on-board initiate d information.  
 
3.21. "Selective braking " means a function within a complex electronic control 
system where actuation of individual brakes is made by automatic means in 
which vehicle retardation is secondary to vehicle behaviour modification.  
 
3.22. "Braki ng signal ": logic signal indicating brake activation as specified in 
paragraph  6.2.22.  
 
3.23. "Emergency braking signal ": logic signal indicating emergency braking as 
specified in paragraph 6.2.23.  
 
4. APPLICATION FOR APPROVAL  
 
4.1. The application for app roval of a vehicle type with regard to braking shall be 
submitted by the vehicle manufacturer or by his duly accredited representative.  
 
4.2. It shall be accompanied by the under -mentioned documents in triplicate and by 
the following particulars:  
 
4.2.1. A description of the vehicle type with regard to the items specified in 
paragraph  3.2. above.  The numbers and/or symbols identifying the vehicle 
type and the engine type shall be specified;  
 
4.2.2. A list of the components, duly identified, constituting th e braking equipment;  
 
4.2.3. A diagram of assembled braking equipment and an indication of the position of 
its components on the vehicle;  
4.2.4. detailed drawings of each component to enable it to be easily located and 
identified.  
 
4.3. A vehicle, represen tative of the vehicle type to be approved, shall be submitted 
to the Technical Service conducting the approval tests.  
 
5. APPROVAL  
 8 
 5.1. If the vehicle type submitted for approval pursuant to this Regulation meets the 
requirements of paragraphs 6. and 7. below, approval of that vehicle type shall 
be granted.  
 
5.2. An approval number shall be assigned to each type approved;  its first two 
digits shall indicate the series of amendments incorporating the most recent 
major technical amendments made to the Regula tion at the time of issue of the 
approval.  The same Contracting Party shall not assign the same number to the 
same vehicle type equipped with another type of braking equipment, or to 
another vehicle type.  
 
5.3. Notice of approval or of refusal of approval  of a vehicle type pursuant to this 
Regulation shall be communicated to the Parties to the Agreement which apply 
this Regulation by means of a form conforming to the model in Annex 1 to this 
Regulation and of a summary of the information contained in the d ocuments 
referred to in paragraphs 4.2.1. to 4.2.4. above.   
 
5.4. There shall be affixed, conspicuously and in a readily accessible place 
specified on the approval form, to every vehicle conforming to a vehicle type 
approved under this Regulation, an international approval mark consisting of:  
 
5.5. The approval mark shall be clearly legible and be indelible.  
 
5.6. The approval mark shall be placed close to or on the vehicle data plate.  
 
5.7. Annex 2 to this Regulation gives examples of arrangements of approval marks.  
 
6. SPECIFICATIONS  
 
6.1. General  
 
6.1.1. Braking equipment  
 
6.1.1.1.  The braking equipment shall be so designed, constructed and fitted as to enable 
the vehicle in normal use, despite the vibration to which it may be subjected, to 
comply wi th the provisions of this Regulation.  
 
6.1.1.2.  In particular, the braking equipment shall be so designed, constructed and 
fitted as to be able to resist the corroding and ageing phenomena to which it is 
exposed.  
 
6.1.1.3.  Brake linings shall not contain a sbestos.  
 9 
 6.1.1.4.  The effectiveness of the braking equipment shall not be adversely affected by 
magnetic or electrical fields.   
 
6.1.1.5.  A failure detection signal may interrupt momentarily (< 10 ms) the demand 
signal in the control transmission, provid ed that the braking performance is 
thereby not reduced.  
 
6.1.2. Functions of the braking equipment  
 
 The braking equipment defined in paragraph 3.3. must fulfil the following 
functions:  
 
6.1.2.1.  Service braking system  
 
The service braking system must make  it possible to control the movement of 
the vehicle and to halt it safely, speedily and effectively, whatever its speed 
and load, on any up or down gradient.  It must be possible to graduate this 
braking action.  The driver must be able to achieve this bra king action from his 
driving seat without removing his hands from the steering control.  
 
6.1.2.2.  Secondary braking system  
 
The secondary braking system must make it possible by application of the 
service brake control to halt the vehicle within a reasonab le distance in the 
event of failure of the service braking system.  It must be possible to graduate 
this braking action.  The driver must be able to obtain this braking action from 
his driving seat without removing his hands from the steering control.  For  the 
purposes of these provisions it is assumed that not more than one failure of the 
service braking system can occur at one time.  
 
6.1.2.3.  Parking braking system  
 
 The parking braking system must make it possible to hold the vehicle 
stationary on an up or down gradient even in the absence of the driver, the 
working parts being then held in the locked position by a purely mechanical 
device.  The driver must be able to achieve this braking action from his driving 
seat. 
 
6.1.3. The requirements of Annex 8 s hall be applied to the safety aspects of all 
complex electronic vehicle control systems which provide or form part of the 
control transmission of the braking function included those which utilize the 
braking system(s) for automatically commanded braking or  selective braking.  
 10 
  However, systems or functions, which use the braking system as the means of 
achieving a higher level objective, are subject to Annex  8 only insofar as they 
have a direct effect on the braking system.  If such systems are provided, the y 
must not be deactivated during type approval testing of the braking system.  
 
6.1.4. Provisions for the periodic technical inspection  of braking systems  
 
6.1.4.1.  It shall be possible to assess the wear condition of the components of the 
service brake that are subject to wear e.g. friction linings and drums/discs (in 
the case of drums or discs, wear assessment may not necessarily be carried out 
at the time of period ic technical inspection).  The method by which this may be 
realized is defined in paragraphs 6.2.11.2. of this Regulation.  
 
6.1.4.2.  It shall be possible to verify, in a simple way, the correct operational status of 
those complex electronic systems which h ave control over braking.  If special 
information is needed, this shall be made freely available.  
 
6.1.4.2.1.  At the time of type approval, the means implemented to protect against simple 
unauthorized modification of the operation to the verification means  chosen by 
the manufacturer (e.g. warning signal) shall be confidentially outlined.  
Alternatively, this protection requirement is fulfilled when a secondary means 
of checking the correct operational status is available.  
 
6.1.4.3.  It shall be possible to g enerate maximum braking forces under static conditions 
on a rolling road or roller brake tester.  
 
6.2. Characteristics of braking systems  
 
6.2.1. The set of braking systems with which a vehicle is equipped must satisfy the 
requirements laid down for service, secondary and parking braking systems.  
 
6.2.2. The systems providing service, secondary and parking braking may have 
common components so long as they fulfil the following conditions:  
 
6.2.2.1.  There  must be at least two controls, independent of e ach other and readily 
accessible to the driver from his normal driving position.  Every brake control 
shall be designed such that it returns to the fully off position when released.  
This requirement shall not apply to a parking brake control when it is 
mechanically locked in an applied position;  
 
6.2.2.2.  The control of the service braking system must be independent of the control 
of the parking braking system;  
 11 
 6.2.2.3.  The effectiveness of the linkage between the control of the service braking 
system and  the different components of the transmission systems must not be 
liable to diminish after a certain period of use;  
 
6.2.2.4.  The parking braking system must be so designed that it can be actuated when 
the vehicle is in motion.  This requirement may be met  by the actuation of the 
vehicle's service braking system, even partially, by means of an auxiliary 
control;  
 
6.2.2.5.  without prejudice to the requirements of paragraph 6.1.2.3. of this Regulation, 
the service braking system and the parking braking system may use common 
components in their transmission(s), provided that in the event of a failure in 
any part of the transmission(s) the requirements for secondary braking are still 
ensured;  
 
6.2.2.6.  In the event of breakage of any component other than the brak es (as defined in 
paragraph 3.6. above) and the components referred to in paragraph  6.2.2.10. 
below, or of any other failure of the service braking system (malfunction, 
partial or total exhaustion of an energy reserve), that part of the service braking 
system which is not affected by the failure, must be able to bring the vehicle to 
a halt in the conditions prescribed for secondary braking;  
 
6.2.2.7.  If service braking is ensured by the action of the driver's muscular energy 
assisted by one or more energy r eserves, secondary braking must, in the event 
of failure of that assistance, be capable of being ensured by the driver's 
muscular energy assisted by the energy reserves, if any, which are unaffected 
by the failure, the force applied to the service brake co ntrol not exceeding the 
prescribed maximum;  
 
6.2.2.8.  If the service braking force and transmission depend exclusively on the use, 
controlled by the driver, of an energy reserve, there must be at least two 
completely independent energy reserves, each provi ded with its own 
transmission, likewise independent; each of them may act on the brakes of only 
two or more wheels so selected as to be capable of ensuring by themselves the 
prescribed degree of secondary braking without endangering the stability of the 
vehicle during braking; in addition, each of the aforesaid energy reserves must 
be equipped with a warning device as defined in paragraph 6.2.14. below;  
 
6.2.2.9.  If the service braking force and transmission depend exclusively on the use of 
an energy reserv e, one energy reserve for the transmission is deemed to be 
sufficient, provided that the prescribed secondary braking is ensured by the 
action of the driver's muscular energy acting on the service brake control and 
the requirements of paragraph 6.2.5. are met; 
 12 
 6.2.2.10.  Certain parts, such as the pedal and its bearing, the master cylinder and its 
piston or pistons, the control valve, the linkage between the pedal and the 
master cylinder or the control valve, the brake cylinders and their pistons, and 
the l ever-and-cam assemblies of brakes, shall not be regarded as liable to 
breakage if they are amply dimensioned, are readily accessible for 
maintenance, and exhibit safety features at least equal to those prescribed for 
other essential components (such as the  steering linkage) of the vehicle.  Any 
such part as aforesaid whose failure would make it impossible to brake the 
vehicle with a degree of effectiveness at least equal to that prescribed for 
secondary braking must be made of metal or of a material with eq uivalent 
characteristics and must not undergo notable distortion in normal operation of 
the braking systems.  
 
6.2.3. The failure of a part of a hydraulic transmission system shall be signalled to 
the driver by a device comprising a red tell -tale signal lig hting up before or 
upon application of a differential pressure of not more than 15.5 bar between 
the active and failed brake equipment, measured at the master cylinder outlet 
and remaining lit as long as the failure persists and the ignition (start) switch  is 
in the "on" (run) position.  However, a device comprising a red tell -tale signal 
lighting up when the fluid in the reservoir is below a certain level specified by 
the manufacturer is permitted.  The tell -tale signal must be visible even by 
daylight; th e satisfactory condition of the signal must be easily verifiable by 
the driver from the driver's seat.  The failure of a component of the device must 
not entail total loss of the braking equipment's effectiveness.  Application of 
the parking brake must als o be indicated to the driver.  The same tell -tale 
signal may be used.  
 
6.2.4. Where use is made of energy other than the muscular energy of the driver, 
there need not be more than one source of such energy (hydraulic pump, air 
compressor, etc.), but the me ans by which the device constituting that source is 
driven must be as safe as practicable.  
 
6.2.4.1.  In the event of failure in any part of the transmission of a braking system, the 
feed to the part not affected by the failure must continue to be ensured i f 
required for the purpose of halting the vehicle with the degree of effectiveness 
prescribed for secondary braking.  This condition must be met by means of 
devices which can easily be actuated when the vehicle is stationary, or by 
automatic means.  
 
6.2.4.2. Furthermore, storage devices located down -circuit of this device must be such 
that in the case of a failure in the energy supply after four full -stroke actuations 
of the service break  control, under the conditions prescribed in paragraph 1.2. 
of Annex  4 to this Regulation, it is still possible to halt the vehicle at the fifth 
application, with the degree of effectiveness prescribed for secondary braking.  13 
  
6.2.4.3.  However, for hydraulic braking systems with stored energy, these provisions 
can be consider ed to be met provided that the requirements of paragraph 1.3. of 
Annex  4 to this Regulation, are satisfied.  
 
6.2.5. The requirements of paragraphs 6.2.2., 6.2.3. and 6.2.4. above must be met 
without the use of any automatic device of a kind such that its ineffectiveness 
might pass unnoticed through the fact that parts normally in a position of rest 
come into action only in the event of failure in the braking system.  
 
6.2.6. The service braking system shall act on all wheels of the vehicle and shall 
distrib ute its action appropriately among the axles.  
 
6.2.7. In the case of vehicles equipped with electric regenerative braking systems of 
category B, the braking input from other sources of braking, may be suitably 
phased to allow the electric regenerative brak ing system alone to be applied, 
provided that both the following conditions are met:  
 
6.2.7.1.  Intrinsic variations in the torque output of the electrical regenerative braking 
system ( e.g. as a result of changes in the electric state of charge in the traction 
batteries) are automatically compensated by appropriate variation in the 
phasing relationship as long as the requirements 1/ of one of the following 
annexes to this Regulation are satisfied:  
 Annex 3, paragraph 1.3.2., or  
 Annex 6, section 5.3. ( Including  the case with the electric motor engaged), and  
  
6.2.7.2.        Wherever necessary, to ensure that braking rate 3/ remains related to the driver's      
braking demand, having reg ard to the available tyre/road adhesion, braking 
shall automatically be caused to act on all wheels of the vehicle.  
 
6.2.8. The action of the service braking system shall be distributed between the 
wheels of one and the same axle symmetrically in relation to the longitudinal 
median plane of the vehicle.  
 
 Compensation and functions, such as anti -lock, which may cause deviations 
from this symmetrical distribution,  shall be declared.  
 
6.2.8.1.  Compensation by the electric control transmission for deterioration or defect 
within the braking system shall be indicated to the driver by means of the 
yellow warning signal specified in paragraph 6.2.21.1.2. below.  This 
                                                
1/ The Authority, which is to grant approval, shall have the right to check the service 
braking  system by additional vehicle test procedures.  14 
 requirement shall apply for all c onditions of loading when compensation 
exceeds the following limits:  
 
6.2.8.1.1.  A difference in transverse braking pressures on any axle:  
 (a) Of 25 per cent of the higher value for vehicle decelerations  2 m/sec2, 
 (b) A value corresponding to 25 per ce nt at 2 m/sec2 for decelerations 
below this rate.  
 
6.2.8.1.2.  An individual compensating value on any axle:  
 (a)  50 per cent of the nominal value for vehicle decelerations  2 m/sec2, 
(b) A value corresponding to 50 per cent of the nominal value at 2 m/s ec2 
for decelerations below this rate.  
 
6.2.8.2.  Compensation as defined above  is permitted only when the initial brake 
application is made at vehicle speeds greater than 10 km/h.  
 
6.2.9. Malfunctions of the electric control transmission shall not apply the brakes 
contrary to the driver's intentions.  
 
6.2.10.  The service, secondary and parking braking systems must act on braking 
surfaces connected to the wheels through components of adequate strength.  
 Where braking torque for a particular axle or axles is provided by both a 
friction braking system and an electrical regenerative braking system of 
category  B, disconnection of the latter source is permitted, providing that the 
friction braking source remains permanently connected and able to provide the 
compensation referred to in paragraph 6.2.7.1.  
 However, in the case of short disconnection transients, incomplete 
compensation is accepted, but within 1s, this compensation shall have attained 
at least 75  per cent of its final value.  
 Nevertheless, in all ca ses, the permanently connected friction braking source 
shall ensure that both the service and secondary braking systems continue to 
operate with the prescribed degree of effectiveness.  
 Disconnection of the braking surfaces of the parking braking system sh all be 
permitted only on condition that the disconnection is controlled exclusively by 
the driver from his driving seat, by a system incapable of being brought into 
action by a leak.  
 
6.2.11.  Wear of the brakes must be capable of being easily taken up by m eans of a 
system of manual or automatic adjustment.  In addition, the control and the 
components of the transmission and of the brakes must possess a reserve of 
travel and, if necessary, suitable means of compensation such that, when the 
brakes become heat ed, or the brake linings have reached a certain degree of 15 
 wear, effective braking is ensured without immediate adjustment being 
necessary.  
 
6.2.11.1.  Wear adjustment shall be automatic for the service brakes.  Automatic wear 
adjustment devices shall be suc h that after heating followed by cooling of the 
brakes, effective braking is still ensured.  In particular the vehicle shall remain 
capable of normal running after the tests conducted in accordance with 
Annex  3, paragraph 1.5. (Type -I test).  
 
6.2.11.2.  Checking the wear of the service brake friction components  
 
6.2.11.2.1.  It shall be possible  to easily assess this wear on service brake linings from the 
outside or underside of the vehicle, without the removal of the wheels, by the 
provision of appropriate inspection holes or by some other means.  This may 
be achieved by utilizing simple standar d workshop tools or common inspection 
equipment for vehicles . 
 
 Alternatively, a sensing device per wheel (twin wheels are considered as a 
single wheel), which will warn the driver at his driving position when lining 
replacement is necessary, is acceptable .  The yellow warning signal specified 
in paragraph  6.2.21.1.2. below  may be used.  
 
6.2.11.2.2.  Assessment of the wear condition of the friction surfaces of brake discs or 
drums may only be performed by direct measurement of the actual component 
or examina tion of any brake disc or drum wear indicators, which may 
necessitate some level of disassembly.  Therefore, at the time of type approval, 
the vehicle manufacturer shall define the following:  
 (a) The method by which wear of the friction surfaces of drums and discs 
may be assessed, including the level of disassembly required and the 
tools and process required to achieve this.  
 (b) Information defining the maximum acceptable wear limit at the point at 
which replacement becomes necessary.  
 This information shall be made freely available, e.g. vehicle handbook or 
electronic data record.  
 
6.2.12.  In hydraulic -transmission braking systems, the filling ports of the fluid 
reservoirs must be readily accessible; in addition, the receptacles containing 
the reserve fluid must be so designed and constructed that the level of the 
reserve fluid can be easily checked without the receptacles having to be 
opened, and the minimum total reservoir capacity is equivalent to the fluid 
displacement resulting when all the wheel c ylinders or calliper pistons serviced 
by the reservoirs move from a new lining, fully retracted position to a fully 
worn, fully applied position.  If these latter conditions are not fulfilled, the red 
warning signal specified in paragraph  6.2.21.1.1. below  shall draw the driver's 16 
 attention to any fall in the level of reserve fluid liable to cause a failure of the 
braking system.  
 
6.2.13.  The type of fluid to be used in hydraulic transmission braking systems shall be 
identified by the symbol in accordance wi th figure 1 or 2 of Standard ISO 
9128 -1987 and the appropriate DOT marking (e.g. DOT 3).  The symbol and 
the marking must be affixed  in a visible position in indelible form within 100 
mm of the filling ports of the fluid reservoirs; additional information may be 
provided by the manufacturer.  
 
6.2.14.   Warning device  
 
6.2.14.1.  Any vehicle fitted with a service brake actuated from an energy reservoir must, 
where the prescribed secondary braking performance cannot be obtained by 
means of this brake without t he use of the stored energy, be provided with a 
warning device, giving an optical or acoustic signal when the stored energy, in 
any part of the system, falls to a value at which without re -charging of the 
reservoir and irrespective of the load conditions o f the vehicle, it is possible to 
apply the service brake control a fifth time after four full -stroke actuations and 
obtain the prescribed secondary braking performance (without faults in the 
service brake transmission device and with the brakes adjusted as  closely as 
possible).  This warning device must be directly and permanently connected to 
the circuit.  When the engine is running under normal operating conditions and 
there are no faults in the braking system, as is the case in type approval tests, 
the w arning device must give no signal except during the time required for 
charging the energy reservoir(s) after start -up of the engine.  The red warning 
signal specified in paragraph 6.2.21.1.1. below shall be used as the optical 
warning signal.  
 
6.2.14.2.  However, in the case of vehicles which are only considered to comply with the 
requirements of paragraph 6.2.4.1. Of this Regulation by virtue of meeting the 
requirements of paragraph  1.3. Of Annex 4 to this Regulation, the warning 
device shall consist of an acoustic signal in addition to an optical signal.  These 
devices need not operate simultaneously, provided that each of them meets the 
above requirements and the acoustic signal is not actuated before the optical 
signal.  The red warning signal specified i n paragraph 6.2.21.1.1. below shall 
be used as the optical warning signal.  
 
6.2.14.3.  This acoustic device may be rendered inoperative while the parking brake is 
applied and/or, at the choice of the manufacturer, in the case of automatic 
transmission the s elector is in the "Park" position.  
 
6.2.15.  Without prejudice to the requirements of paragraph 6.1.2.3. above, where an 
auxiliary source of energy is essential to the functioning of a braking system, 17 
 the reserve of energy must be such as to ensure that, if  the engine stops or in 
the event of a failure of the means by which the energy source is driven, the 
braking performance remains adequate to bring the vehicle to a halt in the 
prescribed conditions.  In addition, if the muscular effort applied by the driv er 
to the parking braking system is reinforced by a servo device, the actuation of 
parking braking must be ensured in the event of a failure of the servo device, if 
necessary by using a reserve of energy independent of that normally supplying 
the servo dev ice.  This reserve of energy may be that intended for the service 
braking system.  
 
6.2.16.  The pneumatic/hydraulic auxiliary equipment must be supplied with energy in 
such a way that during its operation the prescribed deceleration values can be 
reached an d that even in the event of damage to the source of energy the 
operation of the auxiliary equipment cannot cause the reserves of energy 
feeding the braking systems to fall below the level indicated in paragraph 
6.2.14. above.  
 
6.2.17.  In the case of a moto r vehicle equipped to tow a trailer with electric service 
brakes, the following requirements shall be met:  
 
6.2.17.1.  The power supply (generator and battery) of the motor vehicle shall have a 
sufficient capacity to provide the current for an electric brak ing system.  With 
the engine running at the idling speed recommended by the manufacturer and 
all electrical devices supplied by the manufacturer as standard equipment of 
the vehicle switched on, the voltage in the electrical lines shall at maximum 
current consumption of the electrical braking system (15 A) not fall below the 
value of 9.6  V measured at the connection.  The electrical lines shall not be 
capable of short circuiting even when overloaded;  
 
6.2.17.2.  In the event of a failure in the motor vehicle 's service braking system, where 
that system consists of at least two independent units, the unit or units not 
affected by the failure shall be capable of partially or fully actuating the brakes 
of the trailer;  
 
6.2.17.3.  The use of the stop -lamp switch and circuit for actuating the electrical braking 
system is permissible only if the actuating line is connected in parallel with the 
stop-lamp and the existing stop -lamp switch and circuit are capable of taking 
the extra load.  
 18 
 6.2.18.  Additional requirements for vehicles equipped with electric regenerative 
braking systems.  
 
6.2.18.1.  Vehicles fitted with an electric regenerative braking system of category A.  
 
6.2.18.1.1.  The electric regenerative braking shall only be activated by the accelerator 
control and/or the gear neutral position.  
 
6.2.18.2.  Vehicles fitted with an electric regenerative braking system of category B.  
 
6.2.18.2.1.  It must not be possible to disconnect, partially or totally, one part of the service 
braking sy stem other than by automatic means.  This should not be construed 
as a departure from the requirements of paragraph 6.2.10;  
 
6.2.18.2.2.  The service braking system must have only one control device;  
 
6.2.18.2.3.  The service braking system must not be adversely affected by the 
disengagement of the motor(s) or by the gear ratio used;  
 
6.2.18.2.4.  If the operation of the electric component of braking is ensured by a relation 
established between information coming from t he control of the service brake 
and the braking force to the wheels which of it results, a failure of this relation 
leading to the non -respect of the prescriptions of distribution of braking among 
the axles (Annex 5 or 6, which is applicable) must be warne d to the driver by 
an optical warning signal at the latest when the control is actuated and having 
to remain lit as long as this defect exists and that the switch of "contact" is in 
the position "go".  
 
6.2.18.3.  For vehicles fitted with an electric regener ative braking system of either 
category, all the relevant prescriptions shall apply except paragraph 6.2.18.1.1. 
above.  In this case, the electric regenerative braking may be actuated by the 
accelerator control and/or the gear neutral position.  Additiona lly, the action on 
the service braking control must not reduce the above braking effect generated 
by the release of the accelerator control.  
 
6.2.18.4.  The operation of the electric braking must not be adversely affected by 
magnetic or electric fields.  
 
6.2.18.5.  For vehicles equipped with an anti -lock device, the anti -lock device must 
control the electric braking system.  
 19 
 6.2.18.6.  The state of charge of the traction batteries is determined by the method set out 
in Appendix 1 to Annex 3 to this Regulation  2/. 
 
6.2.19.  Special additional requirements for the electric transmission of the parking 
braking system:  
 
6.2.19.1.  In the case of a failure within the electric transmission, any unintended 
actuation of the parking braking system shall be prevented;  
 
6.2.19.2.  In the case of an electrical failure in the control or a break in the wiring within 
the electric control transmission between the control and the ECU directly 
connected with it, excluding the energy supply, it shall remain possible to 
apply the park ing braking system from the driver's seat and thereby be capable 
of holding the laden vehicle stationary on an 8 per cent up or down gradient.  
Alternatively, in  this case, an automatic actuation of the parking brake is 
allowed when the vehicle is stationa ry, provided that the above performance is 
achieved and, once applied, the parking brake remains engaged independently 
of the status of the ignition (start) switch.  In this alternative, the parking brake 
shall be automatically released as soon as the driv er starts to set the vehicle in 
motion again.  The engine/manual transmission or the automatic transmission 
(park position) may be used to achieve or assist in achieving the above 
performance.  
 
6.2.19.2.1.  A break in the wiring within the electrical transmission, or an electrical failure 
in the control of the parking braking system shall be signalled to the driver by 
the yellow warning signal specified in paragraph 6.2.21.1.2.  When caused by a 
break in the wiring within the electrical control transmission of the parking 
braking system, this yellow warning signal shall be signalled as soon as the 
break occurs.  
 In addition, such an electrical failure in the control or break in the wiring 
external to the elect ronic control unit(s) and excluding the energy supply shall 
be signalled to the driver by flashing the red warning signal specified in 
paragraph 6.2.21.1.1. as long as the ignition (start) switch is in the "on" (run) 
position including a period of not less  than 10 seconds thereafter and the 
control is in the "on" (activated) position. However, if the parking braking 
system detects correct clamping of the parking brake, the flashing of the red 
warning signal may be suppressed and the non -flashing red signal shall be used 
to indicate "parking brake applied".  
                                                
2/ By agreement with the Technical Service, state of charge assessment will not be 
required for vehicles, which have an on -board energy source for charging the traction 
batteries and the means for regulating t heir state of charge.  20 
  Where actuation of the parking brake is normally indicated by a separate red 
warning signal , satisfying all the requirements of paragraph  6.2.21.2., this 
signal shall be used to satisfy the above requirem ent for a red signal.  
 
6.2.19.3.  Auxiliary equipment may be supplied with energy from the electric 
transmission of the parking braking system provided that the supply of energy 
is sufficient to allow the actuation of the parking braking system in addition to 
the vehicle electrical load under non -fault conditions.  In addition, where the 
energy reserve is also used by the service braking system, the requirements of 
paragraph  6.2.20.6. shall apply.  
 
6.2.19.4.  After the ignition/start switch which controls the  electrical energy for the 
braking equipment has been switched off and/or the key removed, it shall 
remain possible to apply the parking braking system, whereas releasing shall 
be prevented.  
 
6.2.20.  Special additional requirements for service braking syst ems with electric 
control transmission:  
 
6.2.20.1.  With the parking brake released, the service braking system shall be able to 
generate a static total braking force at least equivalent to that required by the 
prescribed Type -0 test , even when the ignition/start switch has been switched 
off and/or the key has been removed.  It should be understood that sufficient 
energy is available in the energy transmission of the service braking system.  
 
6.2.20.2.  In the case of a single temporary failure (  40 m s) within the electric control 
transmission, excluding its energy supply, (e.g. non -transmitted signal or data 
error) there shall be no distinguishable effect on the service braking 
performance.  
 
6.2.20.3.  A failure within the electric control transmission  3/, not including its energy 
reserve that  affects the function and performance of systems addressed in this 
Regulation shall be indicated to the driver by the red or yellow warning signal 
specified in paragraphs  6.2.21.1.1. and 6.2.21.1.2., respectively, as appropriate.  
When the prescribed service braking performance can no longer be achieved 
(red warning signal), failures resulting from a loss of electrical continuity (e.g. 
breakage, disconnection) shall be signalled to the driv er as soon as they occur, 
and the prescribed secondary braking performance shall be fulfilled by 
                                                
3/ Until uniform test procedures have been agreed, the manufacturer shall provide the 
Technical Service with an analysis of potential failures within the control transmission and 
their effects.  This information shall be subject to discussion and agreement between the 
Technical Service and the vehicle manufacturer.  21 
 operating the service braking control in accordance with paragraph  2.2. of 
Annex 3 to this Regulation.  
 
6.2.20.4.  In the event of a failure of the energy sourc e of the electric control 
transmission, starting from the nominal value of the energy level, the full 
control range of the service braking system shall be guaranteed after twenty 
consecutive full stroke actuations of the service braking control.  During th e 
test, the braking control shall be fully applied for 20 seconds and released for 5 
seconds on each actuation.  It should be understood that during the above test 
sufficient energy is available in the energy transmission to ensure full actuation 
of the se rvice braking system.  This requirement shall not be construed as a 
departure from the requirements of Annex 4.  
 
6.2.20.5.  When the battery voltage falls below a value nominated by the manufacturer at 
which the prescribed service braking performance can no  longer be guaranteed 
and/or which precludes at least two independent service braking circuits from 
each achieving the prescribed secondary braking performance, the red warning 
signal specified in paragraph 6.2.21.1.1. shall be activated.  After the warnin g 
signal has been activated, it shall be possible to apply the service braking 
control and obtain at least the secondary performance prescribed in 
paragraph  2.2. of Annex 3 to this Regulation.  It should be understood that 
sufficient energy is available in  the energy transmission of the service braking 
system.  
 
6.2.20.6.  If auxiliary equipment is supplied with energy from the same reserve as the 
electric control transmission, it shall be ensured that, with the engine running 
at a speed not greater than 80 p er cent of the maximum power speed, the 
supply of energy is sufficient to fulfil the prescribed deceleration values by 
either provision of an energy supply which is able to prevent discharge of this 
reserve when all auxiliary equipment is functioning or by  automatically 
switching off pre -selected parts of the auxiliary equipment at a voltage above 
the critical level referred to in paragraph 6.2.20.5. Of this Regulation such that 
further discharge of this reserve is prevented.  Compliance may be 
demonstrated  by calculation or by a practical test.  This paragraph does not 
apply to vehicles where the prescribed deceleration values can be reached 
without the use of electrical energy.  
 
6.2.20.7.  If the auxiliary equipment is supplied with energy from the electric  control 
transmission, the following requirements shall be fulfilled:  
 
6.2.20.7.1.  In the event of a failure in the energy source, whilst the vehicle is in motion, 
the energy in the reservoir shall be sufficient to actuate the brakes when the 
control is ap plied;  
 22 
 6.2.20.7.2.  In the event of a failure in the energy source, whilst the vehicle is stationary 
and the parking braking system applied, the energy in the reservoir shall be 
sufficient to actuate the lights even when the brakes are applied.  
 
6.2.21.  The general requirements for optical warning signals,  whose function is to 
indicate to the driver certain specified failures (or defects) within the braking 
equipment of the motor vehicle, are set out in the following sub -paragraphs.  
Other than as describ ed in paragraph 6.2.21.5. below, these signals shall be 
used exclusively for the purposes prescribed by this Regulation.  
 
6.2.21.1.  Motor vehicles shall be capable of providing optical brake failure and defect 
warning signals, as follows:  
 
6.2.21.1.1.  A red warning signal, indicating failures defined elsewhere in this Regulation 
within the vehicle braking equipment which preclude achievement of the 
prescribed service braking performance and/or which preclude the functioning 
of at least one of two independen t service braking circuits;  
 
6.2.21.1.2.  Where applicable, a yellow warning signal indicating an electrically detected 
defect within the vehicle braking equipment, which is not indicated by the red 
warning signal described in paragraph 6.2.21.1.1. above.  
 
6.2.21.2.  The warning signals shall be visible, even by daylight; the satisfactory 
condition of the signals shall be easily verifiable by the driver from the driver's 
seat; the failure of a component of the warning devices shall not entail any loss 
of the braking system's performance.  
 
6.2.21.3.  Except where stated otherwise:  
 
6.2.21.3.1.  A specified failure or defect shall be signalled to the driver by the above -
mentioned warning signal(s) not later than on actuation of the relevant braking 
control;  
 
6.2.21.3.2.  The warning signal(s) shall remain displayed as long as the failure/defect 
persists and the ignition (start) switch is in the "on" (run) position; and  
 
6.2.21.3.3.  The warning signal shall be constant (not flashing).  
 
6.2.21.4.  The warning signa l(s) mentioned above shall light up when the electrical 
equipment of the vehicle (and the braking system) is energised.  With the 
vehicle stationary, the braking system shall verify that none of the specified 
failures or defects are present before extingui shing the signals.  Specified 
failures or defects which should activate the warning signals mentioned above, 
but which are not detected under static conditions, shall be stored upon 23 
 detection and be displayed at start -up and at all times when the ignition (start) 
switch is in the "on" (run) position, as long as the failure or defect persists.  
 
6.2.21.5.  Non specified failures (or defects), or other information concerning the brakes 
and/or running gear of the power -driven vehicle, may be indicated by the 
yellow signal specified in paragraph 6.2.21.1.2. above, provided that all the 
following conditions are fulfilled:  
 
6.2.21.5.1.  The vehicle is stationary;  
 
6.2.21.5.2.  After  the braking equipment is first energised and the signal has indicated that, 
following the procedures detailed in paragraph 6.2.21.4. above , no specified 
failures (or defects) have been identified; and  
 
6.2.21.5.3.  Non-specified faults or other information  shall be indicated only by the 
flashing of the warning signal.  However, the warning signal shall be 
extinguished by the time when the vehicle first exceeds 10 km/h.  
 
6.2.22.  Generation of a braking signal to illuminate stop lamps.  
 
6.2.22.1.  Activation of the service braking system by the driver shall generate a signal 
that will be used to illuminate the stop lamps.  
 
6.2.22.2           Activation of the service braking system by "automatically commanded 
braking" shall generate the signal mentioned above.  However, when the 
retardation generated is less than 0.7 m/s2, the signal may be suppressed 4/. 
 
6.2.22.3          Activation of part of the service braking system by "selective braking" shall not         
generate the signal mentioned above 5/.     
6.222. 4       Electric regenerative braking systems, which produce a retarding force upon  
release of the throttle pedal, shall not generate a signal mentioned above.  
 
6.2.23.  When a vehicle is equipped with the means to indicate emergency braking, 
activation an d de-activation of the emergency braking signal shall meet the 
specifications below:  
 
                                                
4/ At the time of type approval, compliance with this requirement shall be confirmed by 
the vehicle manufacturer.  
5/ During a "selective braking" event, the function may c hange to "automatically 
commanded braking".  24 
 6.2.23.1.  The signal shall be activated by the application of the service braking system at 
a deceleration of or above 6 m/s2; 
 The signal shall be de -activated at the latest when the deceleration has fallen 
below  2.5 m/s2. 
 
6.2.23.2.  The following conditions may also be used:  
 (a) The signal  may be activated by the application of the service braking 
system in such a manner that it would produce, in an unladen condition 
and engine disconnected, under the test conditions of Type -0 as 
described in Annex  3, a deceleration of or above  6 m/s2; 
 
  The signal shall be de -activated at the latest when the deceleration has 
fallen below  2.5 m/s2. 
  Or 
 (b) The signal  may be activate d when the service braking system is applied 
at a speed above 50 km/h and the antilock system is fully cycling (as 
defined in paragraph 2. of Annex  6). 
 The signal shall be deactivated when the antilock system is no longer fully 
cycling.  
 
7. TESTS  
 
 Brakin g tests which the vehicles submitted for approval are required to 
undergo, and the braking performance required, are described in Annex 3 to 
this Regulation.  
7.1                  The manufacturer shall supply testing authorities with all technical data  
                        required for carrying out the tests as specified in  annex 1  
7.2                  Sampling  
7.2.1               Type test  
                       One vehicle of the same type or model shall be taken at random . 
7.2.2               Acceptance test  
                        Three vehicles of the same type or model shall be taken at random from the  
                       consignment . 
7.3                  Methods of test  
                       Tests shall be carried out in accordance with  GSO Standards items (2.1 to 2.6 ( 
7.4                 Tests  
                      The following tests shall be carried out on the sample vehicle withdrawn in  
                      accordance with item ( 7.2). 
7.4.1              Determination of brake perfor mance.  
7.4.2              Determination of capacity of energy storage devices.  
7.4.3               Determination of distribution of braking among the axles of vehicles.  25 
 7.4.4               Determination of brake performance of vehicles fitted with anti -lock systems.  
7.4.5                Determination of performance of brake linings.  
7.4.6               Determination of Coefficient of Adhesion.   
 
8-                   INSTRUCTION BOOKLET  
 
                   The manufacturer shall supply with each vehicle, a booklet, in English or  
                    Arabic or both, including instruction for the maintenance of the brake system.  
 
9-                  CRITERIA OF TECHNICAL CONFORMITY  
 
9.1                  The criteria of technical conformity shall be in accordance with Gulf Standard  
                    GSO 48 “Motor Vehicles – Conformity Certificate”.  
9.2                 Vehicles subjected to acceptance test.  
9.2.1               The consignment shall be accepted without carrying out the tests mentioned in  
                      (7.4) in the case of acceptance of the certificate accompanying the consignment.  
9.2.2               If the certificate is not accepted or whenever otherwise deemed necessary, tests  
                     mentioned in 5.4 shall be carried out on the sample vehicle taken according to  
                      (7.2). 
9.2.3             The vehicle shall be considered complying with the requirements of this  
                   standard if the test results passes all the tests mentioned.  
9.2.4             The test results carried out shall be indicated on the test format shown in  
                   Annex 1 . 
 
 
 
 
 
 
 
  
 26 
 Annex 1  
        
 
1. Trade name or mark of the vehicle  ................................ ................................ ...................   
2. Vehicle type  ................................ ................................ ................................ .....................   
3. Manufacturer's name and address  ................................ ................................ .....................   
4. If applicable, name and address of manufacturer's representative ................................ ......  
  ................................ ................................ ................................ ................................ ........   
5. Mass of vehicle  ................................ ................................ ................................ ................   
5.1. Maximum mass of vehicle ................................ ................................ ................................   
5.2. Minimum mass of vehicle  ................................ ................................ ................................   
6. Distribution of mass of each axle (maximum value)  ................................ .........................   
7. Make and type of brake linings  ................................ ................................ ........................   
7.1. Brake linings tested to all relevant prescriptions of Annex 3  ................................ .............   
7.2. Alternative  brake linings tested to Annex 7  ................................ ................................ ......  
8. Engine type  ................................ ................................ ................................ ......................   
9. Number and ratios of gears ................................ ................................ ...............................   
10. Final drive ratio(s)  ................................ ................................ ................................ ............   
11. If applicable, maximum mass of trailer which may be coupled  ................................ .........   
11.1.  Unbraked trailer  ................................ ................................ ................................ ...............   
12. Tyre dimension  ................................ ................................ ................................ ................   
12.1.  Temporary -use spare wheel /  tyre dimensions  ................................ ................................ ..  
12.2.  Vehicle meets the technical requirements of Annex 3 to Regulation No.  64:    
Yes/No 2/ 
13. Maximum design speed  ................................ ................................ ................................ ....  
14. Brief description of braking equipment  ................................ ................................ ............   
15. Mass of vehicle when tested:  ................................ ................................ ............................   
 
 Laden  
(kg) Unladen  
(kg) 
Axle No. 1    
Axle No. 2    
Total    
 
16. Result of the tests:  
 
Test 
Speed  
(km/h)  Measured  
performance  Measured force 
applied to control  
(daN)  
   
   
   
 
 
16.1.  Type -0 tests:  27 
  Engine  disconnected  
 service braking (laden)  
 service braking (unladen)  
 secondary braking (laden)  
 secondary braking (unladen)  
 
16.2.  Type -0 tests:  
 engine connected  
 service braking (laden)  
 service braking (unladen)  
 (In accordance with paragraph 2.1.1. B of Annex 3)  
 
16.3.  Type -I tests:  
 preliminary snubs (to determine pedal force)  
 hot performance (1st stop)  
 hot performance (2nd stop)  
 recovery performance  
 
16.4.  Dynamic parking brake performance  
17. Result of the Annex 5 performance tests  ................................ ................................ ...........   
18. Vehicle is / is not equipped  to tow a trailer with electrical braking systems.  
19. Vehicle is / is not equipped with an anti -lock system.  
19.1.  The vehicle fulfils the requirement of anti-lock systems : Yes / No  
19.2.  Category of anti -lock system: category 1 / 2 / 3   
20. Adequate documentation according to Annex 8 was supplied in respec t of the 
following system(s): ……………………………………………..…..Yes / No 
/ Not applicable  
21. Vehicle submitted for approval on  ................................ ................................ ..................   
22. Technical Service responsible for conducting approval  ................................ ..................   
23. Date of report issued by that Service  ................................ ................................ ..............   
24. Number of report issued by th at Service  ................................ ................................ ..........   
25. Approval granted / refused / extended / withdrawn 2/ 
26. Position of approval mark on the vehicle  ................................ ................................ .........   
27. Place  ................................ ................................ ................................ ...............................   
28. Date  ................................ ................................ ................................ ................................   
29. Signature  ................................ ................................ ................................ .........................   
30. The summary referred to in paragraph 4.3. of this Regulation is annexed to 
this communication  
 
 
 
 
 
 
 
 
 
 
   
 28 
  
 
Annex 1 – Appendix  1 
 
 
LIST OF VEHICLE DATA FOR THE PURPOSE OF REGULATION No.  90 
APPROVALS  
 
1. Description of the vehicle type  ................................ ................................ ...................   
1.1. Trade name or mark of the vehicle, if available  ................................ ..........................   
1.2. Vehicle category  ................................ ................................ ................................ ........   
1.3. Vehicle type according to Regulation No. 13-H approval  ................................ ...........   
1.4. Models or trade names of vehicles constituting the vehicle type, if available  ..............    
1.5. Manufacturer’s name and address  ................................ ................................ ...............   
2. Make and type of brake linings  ................................ ................................ ...................   
2.1. Brake linings tested to all relevant prescriptions of Annex 3  ................................ ......  
2.2. Brake  linings tested to Annex  ................................ ................................ .....................   
3. Minimum mass of vehicle  ................................ ................................ ..........................   
3.1. Distribution of mass of each axle (maximum value)  ................................ ...................   
4. Maximum mass of vehicle  ................................ ................................ ..........................   
4.1. Distribution of mass of each axle (maximum value)  ................................ ...................   
5. Maximum vehicle speed  ................................ ................................ .............................   
6. Tyre and wheel dimensions  ................................ ................................ ........................   
7. Brake circuit configuration (e.g. front/rear or diagonal split)  ................................ ......  
8. Declaration of which is the secondary braking system  ................................ ................   
9. Specifications of brake valves (if applicable)  ................................ ..............................   
9.1. Adjustment specifications of the load sensing valve  ................................ ...................   
9.2. Setting of pressure valve  ................................ ................................ ............................   
10. Designed brake force distribution  ................................ ................................ ...............   
11. Specification of brake  ................................ ................................ ................................ .  
11.1.  Disc brake type (e.g. number of pistons with diameter(s), ventilated or solid      
disc)   
11.2 Drum brake type (e.g. duo servo, with piston size and drum       
dimensions)  ................................ .........................    
11.3. In case of compressed air brake systems, e.g. type and size of chambers, levers,   
 etc. ................................ ................................ ................................ .............................   
12. Master cylinder type and size  ................................ ................................ .....................   
13. Booster type and size  ................................ ................................ ................................ .. "