Regulation No. 17-08

Name:Regulation No. 17-08
Description:Seat Anchorages and Head Restraints.
Official Title:Uniform Provisions Concerning the Approval of: Vehicles with Regard to the Seats, their Anchorages and Any Head Restraints.
Country:ECE - United Nations
Date of Issue:2009-11-06
Amendment Level:08 Series, Supplement 3
Number of Pages:37
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Occupant Protection
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Keywords:

head, seats, vehicle, seat, regulation, test, restraint, approval, restraints, paragraph, position, fitted, annex, type, amendments, requirements, series, plane, case, parts, seat-back, point, area, systems, line, reference, force, vertical, vehicles, means, longitudinal, displacement, system, adjustment, rear, front, date, height, capable, locking, defined, anchorages, entry, paragraphs, tests, adjustable, approved, part, provided, applying

Text Extract:

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E/ECE/324
) Rev.1/Add.16/Rev.5/Amend.1
E/ECE/TRANS/505 )
February 5, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 17-08
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES WITH REGARD TO THE SEATS, THEIR ANCHORAGES AND ANY HEAD
RESTRAINTS
Incorporating:
04 series of amendments
Date of Entry into Force: 28.01.90
Supplement 1 to the 04 series of amendments
Date of Entry into Force: 26.01.94
05 series of amendments
Date of Entry into Force: 26.12.96
06 series of amendments
Date of Entry into Force: 18.01.98
07 series of amendments
Date of Entry into Force: 06.08.98
Supplement 1 to the 07 series of amendments
Date of Entry into Force: 17.11.99
Supplement 2 to the 07 series of amendments
Date of Entry into Force: 13.01.00
Corr. 1 to the 06 series of amendments
Dated: 10.03.99
Corr. 1 to the 07 series of amendments
Dated: 08.03.00
Corr. 1 to Supplement 1 to the 07 series of amendments
Dated: 27.06.01
Corr. 1 to Revision 4 to the 07 series of amendments
Dated: 12.11.03
Corr. 2 to Revision 4 to the 07 series of amendments
Dated: 23.06.04
Supplement 3 to the 07 series of amendments
Date of Entry into Force: 11.06.07
08 series of amendments
Date of Entry into Force: 22.07.09
Supplement 1 to the 08 series of amendments
Date of Entry into Force: 26.07.12
Supplement 2 to the 08 series of amendments
Date of Entry into Force: 10.06.14
Supplement 3 to the 08 series of amendments
Date of Entry into Force: 20.01.16

REGULATION
REGULATION No. 17-08
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES WITH
REGARD TO THE SEATS, THEIR ANCHORAGES AND ANY HEAD RESTRAINTS
CONTENTS
1.
Scope
2.
Definitions
3.
Application for Approval
4.
Approval
5.
Requirements
6.
Tests
7.
Conformity of Production
8.
Penalties for Non-Conformity of Production
9.
Modifications of the Vehicle Type and Extension of Approval with Respect to the Seats, their
Anchorages and/or their Head Restraints
10.
Production Definitely Discontinued
11.
Instruction for use
12.
Names and Addresses of Technical Services Responsible for Conducting Approval Test, and of
Type Approval Authorities
13.
Transitional Provisions
ANNEXES
Annex 1
Annex 2
Annex 3
Communication
Arrangements of the Approval Mark
Procedure for Determining the 'H' Point and the Actual Torso Angle for Seating Positions
in Motor Vehicles
Appendix 1 Description of the Three-dimensional "H" Point Machine
Appendix 2 Three-dimensional Reference System
Appendix 3 Reference Data Concerning Seating Positions
Annex 4
Annex 5
Annex 6
Annex 7
Annex 8
Annex 9
Determination of the Height and Width of Head Restraints
Details of Lines and Measurements Taken During Tests
Test Procedure for Checking Energy Dissipation
Method for Testing the Strength of Seat Anchorages and their Adjustment, Locking and
Displacement Systems
Determination of Dimension "a" of Head Restraint Gaps
Test Procedure for Devices Intended to Protect the Occupants against Displacement of
Luggage
Appendix
Corridor of Sled’s Deceleration or Acceleration as a Function of Time
(Simulation of frontal impact)

2.3. "Seat" means a structure which may or may not be integral with the vehicle structure
complete with trim, intended to seat one person. Depending on its orientation, a seat is
defined as follows:
2.3.1. "Forward-facing seat" means a seat which can be used whilst the vehicle is in motion and
which faces towards the front of the vehicle in such a manner that the vertical plane of
symmetry of the seat forms an angle of less than +10° or -10° with the vertical plane of
symmetry of the vehicle;
2.3.2. "Rearward-facing seat" means a seat which can be used whilst the vehicle is in motion
and which faces towards the rear of the vehicle in such a manner that the vertical plane of
symmetry of the seat forms an angle of less than +10° or -10° with the vertical plane of
symmetry of the vehicle;
2.3.3. "Side-facing seat" means a seat which can be used whilst the vehicle is in motion and
which faces towards the side of the vehicle in such a manner that the vertical plane of
symmetry of the seat forms an angle of 90° (±10°) with the vertical plane of symmetry of the
vehicle;
2.4. "Bench seat" means a structure complete with trim, intended to seat more than one adult
person;
2.5. "Anchorage" means the system by which the seat assembly is secured to the vehicle
structure, including the affected parts of the vehicle structure;
2.6. "Adjustment system" means the device by which the seat or its parts can be adjusted to a
position suited to the morphology of the seated occupant. This device may, in particular,
permit:
2.6.1. Longitudinal displacement;
2.6.2. Vertical displacement;
2.6.3. Angular displacement;
2.7. "Displacement system" means a device by which the seat or one of its parts can be
displaced and/or rotated, without a fixed intermediate position, to permit easy access of
occupants to the space behind the seat concerned;
2.8. "Locking system" means a device ensuring that the seat and its parts are maintained in
the position of use;
2.9. "Folding seat" means a seat, which is normally folded, can be easily operated and is
designed for occasional use by an occupant;
2.10. "Transverse plane" means a vertical plane perpendicular to the median longitudinal plane
of the vehicle;
2.11. "Longitudinal plane" means a plane parallel to the median longitudinal plane of the
vehicle;

3.2.4. In the case of a separate head restraint:
3.2.4.1. A detailed description of the head restraint, specifying in particular the nature of the padding
material or materials;
3.2.4.2. A detailed description of the location, and the attachments for fitting the head restraint to the
structure of the vehicle.
3.3. The following shall be submitted to the technical service responsible for the approval tests:
3.3.1. A vehicle representative of the vehicle type to be approved or the parts of the vehicle which
the technical service deems necessary for approval tests;
3.3.2. An additional set of the seats with which the vehicle is equipped, with their anchorages.
3.3.3. For vehicles with seats fitted or capable of being fitted with head restraints, in addition to the
requirements set out in Paragraphs 3.3.1. and 3.3.2. above:
3.3.3.1. In the case of detachable head restraints: an additional set of seats, fitted with head
restraints, with which the vehicle is equipped, together with their anchorages.
3.3.3.2. In the case of separate head restraints: an additional set of the seats with which the vehicle
is equipped, with their anchorages, an additional set of the corresponding head restraints
and the part of the vehicle structure to which the head restraint in fitted, or a complete
structure.
4. APPROVAL
4.1. If the vehicle submitted for approval pursuant to this Regulation meets the relevant
requirements (seats fitted with head restraints or capable of being fitted with head
restraints), approval of the vehicle type shall be granted.
4.2. An approval number shall be assigned to each type approved. Its first two digits (at
present 08, corresponding to the 08 series of amendments) shall indicate the series of
amendments incorporating the most recent major technical amendments made to the
Regulation at the time of issue of the approval. The same Contracting Party may not assign
the same number either to the same vehicle type equipped with other types of seats or head
restraints or with seats anchored differently on the vehicle (this applies both to seats with
and to those without head restraints) or to another vehicle type.
4.3. Notice of approval or extension or refusal of approval of a vehicle type pursuant to this
Regulation shall be communicated to the Parties to the Agreement applying this Regulation
by means of a form conforming to the model in Annex 1 to this Regulation.

5. REQUIREMENTS
5.1. General Requirements
5.1.1. The installation of side-facing seats shall be prohibited in vehicles of Categories M , N , M
(of Class II, III and B) and M of a technically permissible laden mass not exceeding 10t (of
Class II, III and B).
5.1.2. It does not apply to ambulances or to vehicles intended for use by the armed services, civil
defence, fire services and forces responsible for maintaining public order.
5.2. General Requirements Applicable to all Seats of Vehicles of Category M
5.2.1. Every adjustment and displacement system provided shall incorporate a locking system,
which shall operate automatically. Locking systems for armrests or other comfort devices
are not necessary unless the presence of such devices will cause additional risk of injury to
the occupants of a vehicle in the event of a collision. Folding seats shall lock automatically
in the position of use by occupants.
5.2.2. The unlocking control for a device as referred to in Paragraph 2.7. of this Regulation shall
be placed on the outside of the seat close to the door. It shall be easily accessible, even to
the occupant of the seat immediately behind the seat concerned.
5.2.3. The rear parts of seats situated in Area 1, defined in Paragraph 6.8.1.1. below shall pass
the energy dissipation test in accordance with the requirements of Annex 6 to this
Regulation.
5.2.3.1. This requirement is deemed to be met if in the tests carried out by the procedure specified in
Annex 6 to this Regulation the deceleration of the headform does not exceed 80g
continuously for more than 3ms. Moreover, no dangerous edge shall occur during or remain
after the test.
5.2.3.2. The requirements of Paragraph 5.1.3. shall not apply to rearmost seats, to back-to-back
seats or to seats that comply with the provisions of Regulation No. 21 "Uniform Provisions
concerning the Approval of Vehicles with regard to their Interior Fittings"
(E/ECE/TRANS/505/Rev.1/Add.20/Rev.2, as last amended).
5.2.4. The surface of the rear parts of seats shall exhibit no dangerous roughness or sharp edges
likely to increase the risk of severity of injury to the occupants. This requirement is
considered as satisfied if the surface of the rear parts of seats tested in the conditions
specified in Paragraph 6.1. below exhibit radii of curvature not less than:
2.5mm in Area 1,
5.0mm in Area 2,
3.2mm in Area 3.
These areas are defined in Paragraph 6.8.1. below.

5.3. General Specifications Applicable to Seats of Vehicles of Categories N , N and N
and to Seats of Vehicles of Categories M and M not Covered by Regulation No. 80
With the exception of the provisions of Paragraph 5.1., the requirements also apply to
side-facing seats of all categories of vehicles.
5.3.1. Seats and bench seats must be firmly attached to the vehicle.
5.3.2. Sliding seats and bench seats must be automatically lockable in all the positions provided.
5.3.3. Adjustable seat-backs must be lockable in all the positions provided.
5.3.4. All seats which can be tipped forward or have fold-on backs and folding seats shall lock
automatically in the position of use by occupants.
These requirements do not apply to folding seats fitted in wheelchair spaces or areas for
standing passengers of vehicles of category M or M of Class I, II or A and folding seat(s)
fitted in the access passages of vehicles of category M or M .
5.4. Mounting of Head Restraints
5.4.1. A head restraint shall be mounted on every outboard front seat in every vehicle of
Category M . Seats fitted with head restraints, intended for fitment in other seating positions
and in other categories of vehicles may also be approved to this Regulation.
5.4.2. A head restraint shall be mounted on every outboard front seat in every vehicle of
Category M with a maximum mass not exceeding 3,500kg and of Category N ; head
restraints mounted in such vehicles shall comply with the requirements of
Regulation No. 25, as amended by the 04 series of amendments.
5.5. Special Requirements for Seats Fitted or Capable of being Fitted with Head Restraints
5.5.1. The presence of the head restraint must not be an additional cause of danger to occupants
of the vehicle. In particular, it shall not in any position of use exhibit any dangerous
roughness or sharp edge liable to increase the risk or seriousness of injury to the
occupants.
5.5.1.1. Parts of the front and rear faces of the head restraints situated in Area 1, as defined in
Paragraph 6.8.1.1.3. below, shall be so padded as to prevent any direct contact of the head
with the components of the structure and shall meet the requirements of Paragraph 5.2.4.
below.
5.5.1.2. Parts of the front and rear faces of head restraints situated in Area 2, as defined in
Paragraph 6.8.1.2. below, shall be so padded as to prevent any direct contact of the head
with the components of the structure and shall meet the requirements of Paragraph 5.2.4.
above applicable to the rear parts of seats situated in Area 2. In the case of head restraints
integrated with the seat back, the front face of the head restraint is considered as the area
located above a plane perpendicular to the reference line at 540mm from the R Point and
between two vertical longitudinal planes at 85mm on either side of the reference line.

5.7. In the case of a seat capable of being fitted with a head restraint, the provisions of
Paragraphs 5.2.3. and 5.5.2. above shall be verified.
5.7.1. The height of the part of the device on which the head restraints, measured as described in
Paragraph 6.5. below, shall in the case of a head restraint adjustable for height be not less
than 100mm.
5.8. There shall be no gap of more than 60mm between the seat-back and the head restraint in
the case of a device not adjustable for height. If the head restraint is adjustable for height it
shall, in its lowest position, be not more than 25mm from the top of the seat-back. In the
case of seats or bench seats adjustable in height provided with separate head restraints,
this requirement shall be verified for all the positions of the seat or bench seat.
5.9. In the case of head restraints integral with the seat-back, the area to be considered is:
above a plane perpendicular to the reference line at 540mm from the R point.
Between two vertical longitudinal planes passing at 85mm on either side of the reference
line. In this area, one or more gaps which regardless of their shape can show a distance "a"
of more than 60mm when measured as described in Paragraph 6.7. below, are permitted
provided that, after the additional test under Paragraph 6.4.3.3.2. below, the requirements of
Paragraph 5.12. below are still met.
5.10. In the case of head restraints adjustable for height one or more gaps, which regardless of
their shape can show a distance "a" of more than 60mm when measured as described in
Paragraph 6.7. below, are permitted on the part of the device serving as a head restraint
provided that, after the additional test under Paragraph 6.4.3.3.2. below, the requirements of
Paragraph 5.12. below are still met.
5.11. The width of the head restraint shall be such as to provide appropriate support for the head
of a person normally seated. As determined according to the procedure described in
Paragraph 6.6. below, the head restraint shall cover an area extending not less than 85mm
to each side of the vertical median plane of the seat for which the head restraint is intended.
5.12. The head restraint and its anchorage shall be such that the maximum backward
displacement X of the head permitted by the head restraint and measured in conformity with
the static procedure laid down in Paragraph 6.4.3. below, is less than 102mm.
5.13. The head restraint and its anchorage shall be strong enough to bear without breakage the
load specified in Paragraph 6.4.3.6. below. In the case of head restraints integral with the
seat-back, the requirements of this Paragraph shall apply to the part of the seat-back
structure situated above a plane perpendicular to the reference line at 540mm from the
R point.
5.14. If the head restraint is adjustable, it shall not be possible to raise it beyond the maximum
operational height except by deliberate action on the part of the user distinct from any act
necessary for its adjustment.
5.15. The strength of the seat-back and of its locking devices is deemed to meet the requirements
set out in Paragraph 6.2. below when, after testing in accordance with Paragraph 6.4.3.6.
below, no breakage of the seat or seat-back has occurred; otherwise, it shall be shown that
the seat is capable of meeting the test requirements set out in Paragraph 6.2. below.

For integrated head restraint, the limit between the head restraint and the seat-back is the
one defined in Paragraph 5.16.1.
All measurements shall be taken in the longitudinal median plane of the corresponding seat
or seating position for each seating position constituting the forward boundary of the
luggage compartment.
After the test, no sharp or rough edges likely to increase the danger or severity of injuries of
the occupants shall be present.
5.16.3. The requirements mentioned in Paragraphs 5.16.1. and 5.16.2. above shall not apply to
luggage retention systems which are activated automatically in case of an impact. The
manufacturer shall demonstrate to the satisfaction of the technical service that the
protection offered by such systems is equivalent to that described in Paragraphs 5.16.1. and
5.16.2.
6. TESTS
6.1. General Specifications Applicable to all Tests
6.1.1. The seat-back, if adjustable, shall be locked in a position corresponding to a rearward
inclination as close as possible to 25° from the vertical of the torso reference line of the
manikin described in Annex 3, unless otherwise specified by the manufacturer.
6.1.2. When a seat, its locking mechanism and its installation are identical or symmetrical with
respect to another seat on the vehicle, the technical service may test only one such seat.
6.1.3. In the case of seats with adjustable head restraints, the tests shall be conducted with the
head restraints placed in the most unfavourable position (generally, the highest position)
allowed by its adjusting system.
6.1.4. Folding seats shall be tested in the position of use by occupants.
6.2. Test of Strength of the Seat-back and its Adjustment Systems
6.2.1. A force producing a moment of 53daNm in relation to the R point shall be applied
longitudinally and rearwards to the upper part of the seat-back frame through a component
simulating the back of the manikin shown in Annex 3 to this Regulation. In the case of a
bench seat, where part or all of the supporting frame (including that of the head restraints) is
common to more than one seating position, the test shall be conducted simultaneously for
all those seating positions.
6.3. Test of Strength of the Seat Anchorage and the Adjustment, Locking and
Displacement Systems
6.3.1. A longitudinal horizontal deceleration or, at the choice of the applicant, acceleration of not
less than 20g shall be applied for 30ms in a direction to the whole shell of the vehicle
imitating a frontal collision, in accordance with the requirements of Annex 7, Paragraph 1. At
the request of the manufacturer the test pulse described in Annex 9 - Appendix, may be
used alternatively.
6.3.2. A longitudinal deceleration or, at the choice of the applicant, acceleration in accordance with
the requirements of Paragraph 6.3.1. shall be applied imitating a rear collision.

6.4.3.3. By means of a spherical headform 165mm in diameter an initial force producing a moment
of 37.3daNm about the R point is applied at right angles to the displaced reference line at a
distance of 65mm below the top of the head restraint, the reference line being kept in its
displaced position in accordance with Paragraph 6.4.3.2. above.
6.4.3.3.1. If the presence of gaps prevents the application of the force prescribed in
Paragraph 6.4.3.3. above at 65mm from the top of the head restraint, the distance may be
reduced so that the axis of the force passes through the centre line of the frame element
nearest to the gap.
6.4.3.3.2. In the cases described in Paragraphs 5.9. and 5.10. above, the test shall be repeated by
applying to each gap, using a sphere of 165mm in diameter, a force:
Passing through the centre of gravity of the smallest of the sections of the gap, along
transversal planes parallel to the reference line, and
Reproducing a moment of 37.3daNm about the R point.
6.4.3.4. The tangent Y to the spherical headform, parallel to the displaced reference line, is
determined.
6.4.3.5. The distance X, provided for in Paragraph 5.11. above, between the tangent Y and the
displaced reference line is measured.
6.4.3.6. To check the effectiveness of the head restraint, the initial load specified in
Paragraphs 6.4.3.3. and 6.4.3.3.2. is increased to 89daN unless the breakage of the seat or
seat-back occurs earlier.
6.5. Determination of the Height of the Head Restraint
6.5.1. All lines, including the projection of the reference line, shall be drawn in the vertical median
plane of the seat or seating position concerned, the intersection of such plane with the seat
determining the contour of the head restraint and of the seat-back (see Figure 1 of Annex 4
to this Regulation).
6.5.2. The manikin described in Annex 3 to this Regulation shall be placed in a normal position on
the seat.
6.5.3. The projection of the reference line of the manikin shown in Annex 3 to this Regulation is
then, in the seat concerned, drawn in the plane specified in Paragraph 6.4.3.1. above.
The tangent S to the top of the head restraint is drawn perpendicular to the reference line.
6.5.4. The distance "h" from the R point to the tangent S is the height to be taken into
consideration in implementing the requirements of Paragraph 5.6. above.
6.6. Determination of the Width of the Head Restraint (see Figure 2 of Annex 4 to this
Regulation)
6.6.1. The Plane S , perpendicular to the reference line and situated 65mm below the
tangent S defined in Paragraph 6.5.3. above, determines a section in the head restraint
bounded by the outline C.

6.8.1.3. Area 3
6.8.1.3.1. Area 3 is defined as the part of the back of the seat or the bench seats situated above the
horizontal planes defined in Paragraph 5.2.4.1.3. above, excluding parts situated in Area 1
and Area 2.
6.9. Equivalent Test Methods
If a test method other than those specified in Paragraphs 6.2., 6.3., 6.4. above and Annex 6
is used, its equivalence shall be proved.
7. CONFORMITY OF PRODUCTION
The conformity of production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2), with the following requirements:
7.1. Every vehicle approved pursuant to this Regulation shall be so manufactured as to conform
to the type approved by meeting the requirements set out in Paragraph 5 above. However,
in the case of head restraints as defined in Paragraph 2.12.2. and 2.12.3. above, nothing
shall prevent the vehicle from conforming to the vehicle type approved, even if it is marketed
with seats not fitted with head restraints.
7.2. The Type Approval Authority which granted type approval may at any time verify the
conformity control methods applied for each production unit. The authority may also carry
out random checks on serially-manufactured vehicles in respect to the requirements set out
in Paragraph 5 above.
8. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
8.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 7.1. above are not complied with or if
the vehicles fail in the checks prescribed in Paragraph 7 above.
8.2. If a Party to the Agreement applying this Regulation withdraws an approval it has previously
granted, it shall forthwith so notify the other Contracting Parties applying this Regulation by
means of a communication form conforming to the model in Annex 1 to this Regulation.
9. MODIFICATIONS OF THE VEHICLE TYPE AND EXTENSION OF APPROVAL WITH
RESPECT TO THE SEATS, THEIR ANCHORAGES AND/OR THEIR HEAD RESTRAINTS
9.1. Every modification of the vehicle type with respect to the seats, their anchorages and/or
their head restraints shall be notified to the administrative department which approved the
vehicle type. The department may then either:
9.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect,
and that in any event the vehicle still complies with the requirements; or
9.1.2. consider that the modifications are sufficiently unimportant for the results specified in
Paragraphs 6.2., 6.3., and 6.4. above to be verified by calculations based on the approval
test results; or
9.1.3. Require a further report from the technical service responsible for conducting the tests.

13.5. As from 24 months after the date of entry into force of the 07 series of amendments,
Contracting Parties applying this Regulation shall grant approval only if the vehicle type to
be approved complies with the requirements of this Regulation as amended by the 07 series
of amendments.
13.6. As from 48 months after the date of entry into force of the 07 series of amendments, existing
approvals to this Regulation shall cease to be valid, except in the case of vehicle types
which comply with the requirements of this Regulation as amended by the 07 series of
amendments.
13.7. As from the official date of entry into force of the 08 series of amendments, no Contracting
Party applying this Regulation shall refuse to grant approvals under this Regulation as
amended by the 08 series of amendments.
13.8. As from 24 months after the date of entry into force of the 08 series of amendments,
Contracting Parties applying this Regulation shall grant approvals only if the requirements of
this Regulation, as amended by the 08 series of amendments, are satisfied.
13.9. As from 36 months after the date of entry into force of the 08 series of amendments,
Contracting Parties applying this Regulation may refuse to recognize approvals which were
not granted in accordance with the 08 series of amendments to this Regulation.
13.10. Notwithstanding Paragraphs 13.8. and 13.9., approvals of the vehicle categories which are
not affected by the 08 series of amendments shall remain valid and Contracting Parties
applying the Regulation shall continue to accept them.
13.11. As long as there are no requirements forbidding side-facing seats in their national
requirements at the time of acceding to this Regulation, Contracting Parties may continue to
allow the fitting of side-facing seats for the purpose of national approval and in this case
these bus categories cannot be type approved under this Regulation.

10. Type of device: deceleration/acceleration
11. Vehicle submitted for approval on .........................................................................................................
12. Technical service responsible for conducting approval tests ................................................................
13. Date of report issued by that service .....................................................................................................
14. Number of report issued by that service ................................................................................................
15. Remarks .................................................................................................................................................
16. Approval is granted/refused/extended/withdrawn ...............................................................................
17. Reason(s) of extension (if applicable) ...................................................................................................
18. Position of approval mark on the vehicle ...............................................................................................
19. Place ......................................................................................................................................................
20. Date .......................................................................................................................................................
21. Signature ................................................................................................................................................
22. The following documents, bearing the approval number shown above, are Annexed to this
communication:
...................... Drawings, diagrams and plans of the seats, their anchorages on the vehicle, the
adjustment and displacement systems of the seats and their parts, and their locking
devices;
...................... Photographs of the seats, their anchorages, the adjustment and displacement
systems of the seats and their parts, and their locking devices and of additional
occupant protection system against displacement of luggage.
Note: In the case of seats fitted with head restraints as defined in Paragraphs 2.12.2 and 2.12.3
of this Regulation, the head restraint shall be shown on all drawings, diagrams and
photographs.

MODEL C
(See(
Paragraph 4.5 of this Regulation)
Vehicle with at Least One
Seat Fittedd or Capable
of being Fitted with a Head Restraint
a = 8mmm minimum
The above
approval mark when affixed to a vehicle showss that the vehicle type hass at last one seat fitted
or capable of being fitted with a head restraint, and was approved inn the Netherlands (E4) pursuant to
Regulations Nos. 17 and 33.
The approval numbers indicate that, on thee dates when approval was granted, Regulation No. 17
included the 08 series of amendments but Regulation No. 33 was still s in its original form. The above
approval mark also shows that the
vehicle type was approved pursuant to Regulation No. 17 with regard
to the strength of any seats on the vehicle which are not fitted or capable of being fitted with head
restraints.
MODEL D
(See(
Paragraph 4.5 of this Regulation)
Vehicle with
Seats Not Fitted or Not Capable of being Fitted with Head Restraints
a = 8mmm minimum
The above approval mark when affixed to a vehicle shows that the vehicle v type has seats not fitted or
capable of being fitted with head
restraints, and was approved in the Netherlands (E4) pursuant to
Regulations Nos. 17 and 33. The approval numbers indicate that, on the dates when approval was
granted, Regulation No. 17 included the 08 series of amendments and Regulationn No. 33 was
still in its
original form.

ANNEX 4
DETERMINATION OF THE HEIGHT AND WIDTH OF HEAD RESTRAINTS
Figure 1

ANNEX 5
DETAILS OF LINES AND MEASUREMENTS TAKENN DURING TESTS
1.
Original unloaded position.
2a.
Displaced position by applying to the manikin's back a moment of 373Nm about the R point,
defining the position of the displaced reference line r .
2b.
Displaced position by applying to the 165mm sphere a force F producingg a moment of 373Nm
about the R point, keeping the t displacedd reference line r in place.
3.
Position after displacement
by the force F increased
to 890N.

1.3.2. Speed:
Accuracy: ±2.5% of the actual value;
Sensitivity: 0.5km/h.
1.3.3. Time Recording:
The instrumentation shall enable the action to be recorded throughout its duration and
readings to be made to within one one-thousandth of a second;
The beginning of the impact at the moment of first contact between the headform and the
item being tested shall be detected on the recordings used for analysing the test.
1.4. Test Procedure
1.4.1. Tests on the Seat-back
With the seat installed as indicated in Paragraph 1.1. of this Annex, the direction of impact
from the rear towards the front shall be situated in a longitudinal plane at an angle of 45°
from the vertical.
The impact points shall be selected by the test laboratory in Area 1 as defined in
Paragraph 6.8.1.1. of this Regulation, or if necessary in Area 2 as defined in
Paragraph 6.8.1.2. of this Regulation, on surfaces exhibiting radii of curvature less than
5mm.
1.4.2. Tests on the Head Restraint
The head restraint shall be fitted and adjusted as indicated in Paragraph 1.1. of this Annex.
Impacts shall be performed on points selected by the test laboratory in Area 1 as defined in
Paragraph 6.8.1.1. of this Regulation, and possibly in Area 2 as defined in
Paragraph 6.8.1.2. of this Regulation, on surfaces exhibiting radii of curvature less than
5mm.
1.4.2.1. For the rear face, the direction of impact from the rear towards the front shall be in a
longitudinal plane at an angle of 45° from the vertical.
1.4.2.2. For the front face, the direction of impact from the front towards the rear shall be horizontal
in a longitudinal plane.
1.4.2.3. The front and rear zones are respectively bounded by the horizontal plane tangential to the
top of the head restraint as determined in Paragraph 6.5. of this Regulation.
1.4.3. The headform shall strike the test item at a speed of 24.1km/h: this speed shall be achieved
either by the mere energy of propulsion or by using an additional impelling device.
2. RESULTS
The deceleration rate shall be taken as the average of the readings on the two
accelerometers.
3. EQUIVALENT PROCEDURES (see Paragraph 6.9 of this Regulation).

ANNEX 8
DETERMINATION OF DIMENSION "a" OF HEAD RESTRAINT GAPS
Figure 1
Example of Horizontal Gaps
Note: Section A − A is to be made in a point of the gap area which allows the maximum sphere
intrusion, without exerting any load.
Figure 2
Example of Vertical Gaps
Note: Section A - A is to be made in a point of the gap area which allows the maximum sphere
intrusion, without exerting any load.

2.1.1.3. During the test, the seats must be adjusted to ensure that the locking system cannot be
released by external factors. If applicable, the seats shall be adjusted as follows:
The longitudinal adjustment shall be secured one notch or 10mm in front of the rearmost
possible position of use specified by the manufacturer (for seats with independent vertical
adjustment, the cushion shall be placed to its lowest possible position). The test shall be
carried out with the seat-backs in their normal position of use.
2.1.1.4. If the seat-back is fitted with a head restraint, the test must be carried out with the head
restraint placed in the highest position, if adjustable.
2.1.1.5. If the back(s) of the rear seat(s) can be folded down, they shall be secured in their upright
normal position by the standard locking mechanism.
2.1.1.6. Seats behind which the Type 1 blocks cannot be installed are exempted from this test.
Figure 1
Positions of Test Blocks before Test of Rear Seat-backs
2.1.2. Vehicles with more than Two Rows of Seats
2.1.2.1. If the rearmost row of seats is removable and/or can be folded down by the user according
to the manufacturer's instructions in order to increase the luggage compartment area, then
the seat row immediately in front of this rearmost row shall also be tested.
2.1.2.2. However, in this case, the Technical Service, after consultation with the manufacturer, may
decide not to test one of the two rearmost rows of seats if the seats and their attachments
are of similar design and if the test requirement of 200mm is respected.
2.1.3. When there is a gap, allowing sliding of one Type 1 block past the seats, then the test loads
(two Type 1 blocks) shall be installed behind the seats after agreement between the
Technical Service and the manufacturer.
2.1.4. The Exact Test Configuration shall be Noted in the Test Report.

ANNEX 9 - APPENDIX
CORRIDOR OF SLED'S DECELERATION OR ACCELERATION AS A FUNCTION OF TIME
(Simulation of Frontal Impact)
Seat Anchorages and Head Restraints.