27.12.2006 EN Official Journal of the European Union L 373/1 
 I 
(Acts whose publication is obligatory) 
Regulation No  17 of the Econ omic Commission for Europe of the United Nations (UN/ECE) 
— Uniform provisions concerning th e approval of vehicles with 
regard to the seats, their anchorages and any head restraints 
 
 
 
Revision 4 
 
Incorporating all valid text up to: 
07 series of amendments - Date of entry into force:  6 August 1998 
Supplement 1 to the 07 series of amendments - Date of entry into force:  17 November 1999 Supplement 2 to the 07 series of amendments - Date of entry into force:  13 January 2000 
Corrigendum 1 to the 06 series of amendments subject of Depositary Notification 
C.N.655.1999.TREATIES-1 dated 19 July 1999 Corrigendum 1 to the 07 series of amendments subject of Depositary Notification C.N.425.2000.TREATIES-1 dated 27 June 2000 Corrigendum 1 to Supplement 1 to the 07 series of  amendments subject of  Depositary Notification 
C.N.814.2001.TREATIES-1 dated 23 August 2001 
Corrigendum 1 to Revision 4 of the Regulation, subject of Depositary Notification C.N. 165.2004. 
TREATIES-1 dated 4 March 2004 Corrigendum 2 to Revision 4 of the Regulation, su bject of Depositary Notification C.N. 1035.2004. 
TREATIES-1 dated 4 October 2004  
 
L 373/2 EN Official Journal of the European Union 27.12.2006 
  
1. SCOPE 
  This Regulation applies to the strength of seats, to their anchorages and to their head 
restraints, of vehicles of categories M1 and N, and to the strength of seats, to their anchorages and to their head restraints, of vehicles of categories M2 and M3, not covered 
by Regulation No. 80, 01 series of amendments. 1
/ 2/ 
 
 It also applies to the design of the rear parts of seat-backs 2 / and to devices intended to 
protect the occupants from the danger resulti ng from the displacement of luggage in a 
frontal impact, of vehicles of category M1. 
 
 It does not apply to folding, side-facing or rearward-facing seats, or to any head restraint 
fitted to these seats. 
 2. DEFINITIONS   For the purposes of this Regulation 
 
2.1. "Approval of a vehicle
" means the approval of a vehicle type with regard to the strength of 
the seats and their anchorages, the design of  the rear parts of the seat-backs and the 
characteristics of their head restraints; 
 
2.2. "Vehicle type " means a category of motor vehicles which do not differ in such essential 
respects as: 
 2.2.1. the structure, shape, dimensions, mate rials and the mass of the seats, although the seats 
may differ in covering and colour; differences not exceeding 5 per cent in the mass of the 
approved seat type shall not be considered significant; 
 2.2.2. the type and dimensions of the adjust ment, displacement and locking systems of the 
seat-back and seats and their parts; 
 2.2.3 the type and dimensions of the seat anchorages; 
 
2.2.4. the dimensions, frame, materials and padding of head restraints, although they may differ in 
colour and covering; 
 2.2.5. the type and dimensions of the attachment s of the head restraint and the characteristics of 
the part of the vehicle to which the head restra int is attached, in the case of a separate head 
restraint; 
 2.3. "Seat
" means a structure which may or may not be integral with the vehicle structure 
complete with trim, intended to seat one adult person.  The term cove rs both an individual 
seat or part of a bench seat intended to seat one person; 
 
                         
1/ As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), annex 7 (document 
TRANS/WP.29/78/Rev.1/Amend.2). 
 2
/ The rear parts of seat-backs of vehi cles of category M1 are considered to comply with the provisions of 
paragraphs 5.1.3. and 5.1.4. of this Regulation provided they comply with the provisions of Regulation No. 21 
"Uniform Provisions concerning the Approval of Vehicles with regard to their Interior Fittings" (E/ECE/324-E/ECE/TRANS/505/Rev.1/Add.20/Rev.2).  
27.12.2006 EN Official Journal of the European Union L 373/3 
 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 an auxiliary seat intended fo r occasional use and normally folded; 
 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; 
 2.12. "Head restraint
" means a device whose purpose is to lim it the rearward displacement of an 
adult occupant's head in relation to his torso in order to reduce the danger of injury to the 
cervical vertebrae in the event of an accident; 
 
2.12.1. "Integrated head restraint " means a head restraint formed by  the upper part of the seat-back.  
Head restraints meeting the definitions of para graphs 2.12.2. or 2.12.3. below but which can 
only be detached from the seat or the vehicle st ructure by the use of tools or by partial or 
complete removal of the seat coveri ng, meet the present definition; 
 
2.12.2. "Detachable head restraint " means a head restraint consisting of a component separable 
from the seat designed for insertion and positiv e retention in the seat-back structure; 
 2.12.3. "Separate head restraint
" means a head restraint consisting of a component separate from 
the seat, designed for insertion and/or positive re tention in the structure of the vehicle; 
 
2.13. "R point " means the seating reference point as defined in annex 3 to this Regulation; 
 2.14. "Reference line
" means the line on the manikin reproduced in annex 3, appendix 1, figure 1, 
to this Regulation. 
 
2.15.  "Partitioning system " means parts or devices which, in addition to the seat-backs, are 
intended to protect the occupants from displaced luggage; in particular, a partitioning system may be constituted by netting or wire mesh lo cated above the level of the seat-backs in their 
L 373/4 EN Official Journal of the European Union 27.12.2006 
 upright or folded down position.  Head restra ints fitted as standard equipment for vehicles 
equipped with such parts or devices shall be c onsidered as part of the partitioning system.  
However, a seat equipped with a head restrain t shall not be considered as being on its own a 
partitioning system. 
 3. APPLICATION FOR APPROVAL  
3.1. The application for approval of a vehicle type shall be submitted by the vehicle 
manufacturer or by his duly accredited representative. 
 3.2. It shall be accompanied by the following documents in triplicate and the following 
particulars: 
 
3.2.1. a detailed description of the vehicle type  with regard to the design of the seats, their 
anchorages, and their adjustment, displacement and locking systems; 
 3.2.1.1. A detailed description and/or drawings of the partitioning system, if applicable. 
 
3.2.2. drawings, on an appropriate scale and in su fficient detail, of the seats, their anchorages on 
the vehicle, and their adjustment, displacement and locking systems. 
 3.2.3. In the case of a seat with a detachable head restraint:  
3.2.3.1. a detailed description of the head restraint,  specifying in particular the nature of the padding 
material or materials; 
 3.2.3.2. a detailed description of the location, th e type of support and the attachments for mounting 
the head restraint on the seat. 
 
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 fo r fitting the head restraint to the 
structure of the vehicle. 
 3.3. The following shall be submitted to the tec hnical 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 r estraints, in addition to 
the requirements set out in paragraphs 3.3.1. and 3.3.2.: 
 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 e quipped, 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 additiona l set of the corresponding head restraints and 
the part of the vehicle structure to which the head  restraint in fitted, or a complete structure. 
27.12.2006 EN Official Journal of the European Union L 373/5 
  
4. APPROVAL 
 4.1. If the vehicle submitted for approval pursua nt to this Regulation meets the relevant 
requirements (seats fitted with head restrain ts 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 t ype approved.  Its first two digits (at present 
07, corresponding to the 07 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 Parti es to the Agreement applying this Regulation 
by means of a form conforming to the model in annex 1 to this Regulation. 
 
4.4. 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: 
 
L 373/6 EN Official Journal of the European Union 27.12.2006 
 4.4.1. a circle surrounding the letter "E" followed by the distinguishing number of the country 
which has granted approval; 3 / 
 4.4.2. the number of this Regulation, followed by  the letter "R", a dash and the approval number, 
to the right of the circle prescribed in paragraph 4.4.1. 
 4.4.3. However, if the vehicle is equipped with one or more seats fitted or capable of being fitted 
with head restraints, approved as meeting th e requirements under paragraphs 5.1. and 5.2. 
below, the number of this Regulation shall be followed by the letters "RA".  The form 
conforming to the model in annex 1 to this Regulation shall indicate which seat(s) of the 
vehicle is (are) fitted or capable  of being fitted with head restraints.  The marking shall also 
indicate that any remaining seats in the vehicle,  not fitted or capable of being fitted with 
head restraints, are approved and meet the re quirements of paragraph 5.1. below of this 
Regulation. 
 4.5. If the vehicle conforms to a vehicle type  approved under one or more other Regulations 
annexed to the Agreement in the country whic h has granted approval under this Regulation, 
the symbol prescribed in para graph 4.4.1. need not be repeated; in such a case the 
Regulation and approval numbers and the add itional symbols of all the Regulations under 
which approval has been granted in the c ountry which has granted approval under this 
Regulation shall be placed in vertical columns to the right of the symbol prescribed in paragraph 4.4.1. 
 
4.6. The approval mark shall be clearly legible and be indelible. 
 4.7. The approval mark shall be placed close to  or on the vehicle data plate affixed by the 
manufacturer. 
 
4.8. Examples of arrangements of approval mark s are given in annex 2 to this Regulation. 
 5.  REQUIREMENTS  5.1. General requirements applicable to all seats of vehicles of category M1
 4/ 
 
5.1.1. Every adjustment and displacement syst em provided shall incorporate a locking system, 
which shall operate automatically.  Locking systems for armrests or other comfort devices 
                         
3/ 1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 
8 for the Czech Republic, 9 for Spain,  10 for Yugoslavia, 11 fo r the United Kingdom, 12  for Austria, 13 for 
Luxembourg, 14 for Switzerland, 15 (vacant), 16 for Norway, 17 for Finland, 18 for Denmark, 19 for Romania, 20 for 
Poland, 21 for Portugal, 22 fo r the Russian Federation, 23 fo r Greece, 24 for Irel and, 25 for Croatia , 26 for Slovenia, 
27 for Slovakia, 28 for Belarus, 29 for Estonia, 30 (vacant), 31 for Bosnia and Herzegovina, 32 for Latvia, 33 (vacant), 34 for Bulgaria, 35  (vacant), 36 for Lithuania, 37 for Turkey, 38 (vacant), 39 for Azerbaijan, 40 for The 
former Yugoslav Republic of  Macedonia, 41 (vacant), 42 for the European Community (Approvals are granted by its 
Member States using their respective ECE symbol), 43 for Japa n, 44 (vacant), 45 for Australia, 46 for Ukraine, 47 for 
South Africa and 48 for New Zealand.  Subsequent numbers shall be assigned to other countries in the chronological 
order in which they ratify or accede to  the Agreement Concerning  the Adoption of Uniform Technical Prescriptions 
for Wheeled Vehicles, Equipment and Pa rts which can be Fitted and/or be Used on Wheeled Vehicles and the 
Conditions for Reciprocal Recognition of Approvals Grante d on the Basis of these Prescriptions, and the numbers 
thus assigned shall be communicated by the Secretary-Genera l of the United Nations to the Contracting Parties to the 
Agreement. 
 
4
/ Vehicles of category M2, which are approved to this Regulation as an alternative to Regulation No. 80 (in 
line with paragraph 1.2. to that Regulation) shall also meet the requiremen ts of this paragraph. 
27.12.2006 EN Official Journal of the European Union L 373/7 
 are not necessary unless the presence of such devi ces will cause additional risk of injury to 
the occupants of a vehicle in the event of a collision. 
 5.1.2. The unlocking control for a device as referre d to in paragraph 2.7. 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. 
 
5.1.3. The rear parts of seats situated in area 1, defined in paragraph 6.8. 1.1. shall pass the energy 
dissipation test in accordance with the requi rements of annex 6 to  this Regulation. 
 5.1.3.1. This requirement is deemed to be met if in  the tests carried out by the procedure specified in 
annex 6 the deceleration of the headform does not exceed 80 g continuously for more than 
3 ms.  Moreover, no dangerous edge shall occur during or remain after the test. 
 5.1.3.2. The requirements of paragraph 5.1.3. shall not apply to rearmost seats or to back-to-back 
seats. 
 5.1.4. The surface of the rear parts of seats sh all exhibit no dangerous roughness or sharp edges 
likely to increase the risk of sev erity 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. exhib it radii of curvature not less than: 
  2,5 mm in area 1, 
 5,0 mm in area 2, 
 3,2 mm in area 3.   These areas are defined in paragraph 6.8.1.  
5.1.4.1. This requirement does not apply to: 
 5.1.4.1.1. the parts of the different areas exhi biting a projection of less than 3,2 mm from the 
surrounding surface, which shall exhibit blunted edges, provided that the height of the projection is not more than half its width; 
 
5.1.4.1.2. rearmost seats and back-to-back seats; 
 5.1.4.1.3. Rear parts of seats situated below a hor izontal plane passing through the lowest R point in 
each row of seats.  (Where rows of seats have different heights, starting from the rear, the plane shall be turned up or down forming a ve rtical step passing through the R point of the 
row of seats immediately in front); 
 5.1.4.1.4. parts such as "flexible wire mesh".  5.1.4.2. In area 2, defined in pa ragraph 6.8.1.2., surface s may exhibit radii less than 5 mm, but not 
less than 2,5 mm provided that they pass the en ergy-dissipation test prescribed in annex 6 to 
this Regulation.  Moreover, these surfaces must  be padded to avoid direct contact of the 
head with the seat frame structure. 
 5.1.4.3. If the areas defined above contain parts c overed with material softer than 50 Shore A 
hardness, the above requirements, with the exception of those relating to the 
energy-dissipation test in accordance with the requirements of annex6, shall apply only to 
the rigid parts. 
 
L 373/8 EN Official Journal of the European Union 27.12.2006 
 5.1.5. No failure shall be shown in the seat frame  or in the seat anchorage, the adjustment and 
displacement systems or their locking devices during or after the tests prescribed in 
paragraphs 6.2. and 6.3.  Permanent defo rmations, including ruptures, may be accepted, 
provided that these do not increase the risk of injury in the event of a collision and the 
prescribed loads were sustained. 
 5.1.6. No release of the locking systems shall o ccur during the tests described in paragraph 6.3. 
and in annex 9, paragraph 2.1. 
 5.1.7. After the tests, the displacement syst ems intended for permitting or facilitating the access 
of occupants must be in working order; they  must be capable, at least once, of being 
unlocked and must permit the displacement of th e seat or the part of the seat for which they 
are intended. 
  Any other displacement systems, as well as ad justment systems and their locking systems 
are not required to be in working order. 
  In the case of seats provided with head restra ints, the strength of the seat-back and of its 
locking devices is deemed to meet the require ments set out in paragraph 6.2. when, after 
testing in accordance with paragraph 6.4.3. 6., no breakage of the seat or seat-back has 
occurred:  otherwise, it must be shown that  the seat is capable of meeting the test 
requirements set out in paragraph 6.2. 
 
 In the case of seats (benches) with more places to sit than head restrain ts, the test described 
in paragraph 6.2. shall be carried out. 
 5.2.  General specifications applicable to seats of vehicles of
 
categories N1, N2 and N3 and to seats of vehicles of categories M2 and M3 not covered by 
Regulation No. 80  
 5.2.1.  Seats and bench seats must be firmly attached to the vehicle.  5.2.2.  Sliding seats and bench seats must be auto matically lockable in a ll the positions provided. 
 
5.2.3.  Adjustable seat-backs must be lockable in all the positions provided. 
 5.2.4.  All seats which can be tipped forward or ha ve fold-on backs must lo ck automatically in the 
normal position. 
 
5.3.  Mounting of head restraints
 
 5.3.1.  A head restraint shall be mounted on ever y outboard front seat in every vehicle of category 
M1.  Seats fitted with head restraints, intende d for fitment in other seating positions and in 
other categories of vehicles may also  be approved to this Regulation. 
 
5.3.2.  A head restraint shall be mounted on ever y outboard front seat in every vehicle of category 
M2 with a maximum mass not exceeding 3500 kg and of category N1; head restraints mounted in such vehicles shall comply with the requirements of Regulation No. 25, as amended by the 03 series of amendments. 
 
27.12.2006 EN Official Journal of the European Union L 373/9 
 5.4. Special requirements for seats fitted or capable of being fitted with head restraints  
 
5.4.1. 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 exhibi t any dangerous roughness 
or sharp edge liable to increase the risk or  seriousness of injury to the occupants. 
 5.4.2. Parts of the front and rear faces of the he ad restraints situated in area 1, as defined in 
paragraph 6.8.1.1.3. below shall pass the energy absorption test. 
 5.4.2.1. This requirement is deemed to be met if in  the tests carried out by the procedure specified in 
annex 6 the deceleration of the headform does not exceed 80 g continuously for more than 3 ms.  Moreover, no dangerous edge shall occur during or remain after the test. 
 
5.4.3. Parts of the front and rear faces of head  restraints situated in area 2, as defined in 
paragraph 6.8.1.2.2. below, shall be so padded as to prevent any direct contact of the head 
with the components of the structure and sha ll meet the requirements of paragraph 5.1.4. 
above applicable to the rear parts of seats situated in area 2. 
 
5.4.4. The requirements of paragraphs 5.4.2. and 5. 4.3. above, shall not apply to parts of rear faces 
of head restraints designed to be fitte d to seats behind which no seat is provided. 
 5.4.5. The head restraint shall be  secured to the seat or to the vehi cle structure in such a way that 
no rigid and dangerous parts project from the padding of the head restraint or from its 
attachment to the seat-back as a result of the pressure exerted by the headform during the 
test. 
 5.4.6. In the case of a seat fitted with a head restra int, the provisions of paragraph 5.1.3. may, after 
agreement of the technical service, be considered  to be met if the seat fitted with its head 
restraint complies with the provisions of paragraph 5.4.2. above. 
 5.5. Height of head restraints
 
 5.5.1. The height of head restraints shall be  measured as described in paragraph 6.5. below. 
 
5.5.2. For head restraints not adjustable for hei ght, the height shall be not less than 800 mm in the 
case of front seats and 750 mm in the case of other seats. 
 5.5.3. For head restraints  adjustable for height: 
 
5.5.3.1. the height shall be not less than 800 mm  in the case of front seats and 750 mm in the case of 
other seats; this value shall be obtained in  a position between the highest and lowest 
positions to which adjustment is possible; 
 5.5.3.2. there shall be no "use position" r esulting in a height of less than 750 mm; 
 
5.5.3.3. in the case of seats other than the front seats the head restraints may be  such that they can be 
displaced to a position resulting in a height of  less than 750 mm, provided that such position 
is clearly recognizable to the occupant as not be ing included for the use of the head restraint; 
 5.5.3.4. in the case of front seats head restraints  may be such that they  can be automatically 
displaced when the seat is not occupied, to a position resulting in a height of less than 
750 mm, provided that they automatically retu rn to the position of use when the seat is 
occupied. 
L 373/10 EN Official Journal of the European Union 27.12.2006 
  
5.5.4. The dimensions mentioned in paragraphs 5. 5.2. and 5.5.3.1. above may be less than 800 mm 
in the case of front seats and 750 mm in the case of other seats to leave adequate clearance 
between the head restraint and the interior surf ace of the roof, the windows or any part of the 
vehicle structure; however, the clearance sha ll not exceed 25 mm.  In the case of seats fitted 
with displacement and/or adjustment system s, this shall apply to all seat positions.  
Furthermore, by derogation to paragraph 5.5. 3.2. above, there shall not be any "use position" 
resulting in a height lower than 700 mm. 
 5.5.5. By derogation to the height requirements me ntioned in paragraphs 5.5.2. and 5.5.3.1. above, 
the height of any head restraint designed to  be provided in rear centre seats or seating 
positions shall be not less than 700 mm. 
 
5.6. In the case of a seat capable of being fitt ed with a head restraint, the provisions of 
paragraphs 5.1.3. and 5.4.2.  above shall be verified. 
 5.6.1. The height of the part of the device on which the head rests, measured as described in 
paragraph 6.5. below, shall in the case of a head  restraint adjustable for height be not less 
than 100 mm. 
 5.7. There shall be no gap of more than 60 mm between the seat-back and the head restraint in 
the case of a device not adjustable for height.  If th e head restraint is adjustable for height it 
shall, in its lowest position, be not more than  25 mm 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. 
 5.8. In the case of head restraints integral w ith the seat-back, the area to be considered is: 
 
 above a plane perpendicular to the reference line at 540 mm from the R point. 
  Between two vertical longitudinal planes passi ng at 85 mm 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 60 mm when measured as describ ed in paragraph 6.7. below, are permitted 
provided that, after the additional test under pa ragraph 6.4.3.3.2. below, the requirements of 
paragraph 5.11. below are still met. 
 5.9. In the case of head restraints adjustable fo r height one or more gaps, which regardless of 
their shape can show a distance "a" of more  than 60 mm 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 pa ragraph 6.4.3.3.2. below, the requirements of 
paragraph 5.11. below are still met. 
 5.10. The width of the head restraint shall be su ch 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 sh all cover an area extending not less than 85 mm 
to each side of the vertical median plane of th e seat for which the head restraint is intended. 
 5.11. 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 paragr aph 6.4.3. below, is less than 102 mm. 
 
5.12. The head restraint and its anchorage sha ll 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 
27.12.2006 EN Official Journal of the European Union L 373/11 
 seat-back, the requirements of this paragraph shall apply to the part of the seat-back 
structure situated above a plane perpendicula r to the reference line at 540 mm from the R 
point. 
 5.13. If the head restraint is adjustable, it sha ll 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. 
 
5.14. The strength of the seat-back and of its lock ing 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 requi rements set out in paragraph 6.2. below. 
 
5.15.  Special requirements regarding the protection of occupants from displaced luggage
 
 5.15.1.  Seat-backs     Seat-backs and/or head restraints located such that they constitute the forward boundary of 
the luggage compartment, all seats being in  place and in the normal position of use as 
indicated by the manufacturer, shall have suffi cient strength to protect the occupants from 
displaced luggage in a frontal im pact.  This requirement is deemed to be met if, during and 
after the test described in annex 9, the seat-backs remain in po sition and the locking 
mechanisms remain in place.  However, the deformation of the seat-backs and their 
fastenings during the test is permitted, provided that the forward contour of the parts of the 
tested seat-back and/or head restraints, that  are harder than 50 Shore A, does not move 
forward of a transverse vertical plane which passes through: 
 
(a) a point of 150 mm forward of the R point of the seat in question, for the parts of 
the head restraint; 
 (b) a point of 100 mm forward of the R point of the seat in question, for parts of the 
seat-back; 
 
excluding the rebound phases of the test blocks. 
 
For integrated head restraints, the limit betw een the head restraint and the seat-back is 
defined by the plane perpendicular to th e reference line 540 mm from the R point. 
 All measurements shall be taken in the longi tudinal median plane of the corresponding seat 
or seating position for each seating position c onstituting the forward boundary of the 
luggage compartment. 
  During the test described in annex 9, the test  blocks shall remain behind the seat-back(s) in 
question. 
 
5.15.2.  Partitioning systems 
   At the request of the vehicle manufacturer, the test described in annex 9 may be carried out 
with the partitioning systems in place, if th ese systems are fitted as standard equipment for 
the particular type of vehicle. 
 
  Partitioning systems, netting wire mesh located above the seat-backs in their normal 
position of use, shall be tested accord ing to paragraph 2.2. of annex 9. 
L 373/12 EN Official Journal of the European Union 27.12.2006 
  
  This requirement is deemed to be met if, dur ing the test, the partitioning systems remain in 
position.  However, the defo rmation of the partitioning systems during the test is 
permitted, provided that the fo rward contour of the partitioning (including parts of the 
tested seat-back(s) and/or head restraint(s) that are harder than 50 Shore A does not move 
forward of a transverse vertical plane which passes through: 
 
(a) a point of 150 mm forward of the R point of the seat in question, for parts of the 
head restraint; 
 (b) a point of 100 mm forward of the R point of the seat in question, for parts of the 
seat-back and part of the partitioning syst em others than the head restraint. 
 
 For integrated head restraint, the limit betw een the head restraint and the seat-back is the 
one defined in paragraph 5.15.1. 
  All measurements shall be taken in the l ongitudinal median plane of the corresponding seat 
or seating position for each seating position c onstituting 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. 
 
5.15.3.  The requirements mentioned in paragraphs 5.13.1. and 5.13.2. 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 5.15.1. and 
5.15.2. 
 
6. TESTS  6.1. General specifications  applicable to all tests
 
 6.1.1. The seat-back, if adjustable, shall be lo cked 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 adju stable 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. 
 6.2. Test of strength of the seat-back and its adjustment systems
 
 
6.2.1. A force producing a moment of 53 daNm 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, th e test shall be conducted simultaneously for 
all those seating positions. 
 
27.12.2006 EN Official Journal of the European Union L 373/13 
 6.3. Test of strength of the seat anchorage and the adjustment, locking and displacement systems  
 
6.3.1. A longitudinal horizontal deceleration of  not less than 20 g shall be applied for 30 
milliseconds in the forward direction to the w hole shell of the vehicle, 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 in accordance with  the requirements of paragraph 6.3.1. shall be 
applied in the rearward direction. 
 6.3.3. The requirements of paragraphs 6.3.1. and 6. 3.2. above shall be verified for all positions of 
the seat.  In the case of seats fitted with an ad justable head restraint, the test shall be 
conducted with the head restraints placed in the most unfavourable position (generally the 
highest position) allowed by its adjusting syst em.  During the test the seat shall be so 
positioned that no external factor shall pr event the release of the locking systems. 
  These conditions shall be considered to be met if  the seat is tested after being adjusted in the 
following positions: 
 
 the longitudinal adjustment is fixed one not ch or 10 mm rearward of the most forward 
normal driving position or position of use as indicated by the manufacturer (for seats with independent vertical adjustment, the cushi on shall be placed in its highest position); 
 
 the longitudinal adjustment is fixed one not ch or 10 mm forward of the most rearward 
normal driving position or position of use as indicated by the manufacturer (for seats with independent vertical adjustment, the cushion shall be placed in its lowest position), and, 
where appropriate, in accordance with the re quirements of paragraph 6.3.4. below. 
 
6.3.4. In cases where the arrangement of the locki ng systems is such that, in a seat position other 
than those defined in paragraph 6.3.3. above , the distribution of the forces on the locking 
devices and seat anchorages would be less favourab le than with either configuration defined 
in paragraph 6.3.3., the tests shall be c onducted for that less favourable seating position. 
 6.3.5. The test conditions of paragraph 6.3.1. shall be  considered to be satisfied if, at the request of 
the manufacturer, they are replaced by a collisi on test of the complete vehicle in running 
order against a rigid barrier as laid down in para graph 2. of annex 7 to this Regulation.  In 
this case, the seat shall be adjusted for the least favourable conditions of distribution of 
stresses in the anchorage system as provided for in paragraphs 6.1.1., 6.3.3. and 6.3.4. above. 
 
6.4. Test of the performance of the head restraint
 
 6.4.1. If the head restraint is adjustable, it sh all be placed in the most unfavourable position 
(generally the highest position) allowed by its adjustment system. 
 
6.4.2. In the case of a bench seat, where part or a ll 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. 
 6.4.3. Test
 
 
6.4.3.1. All lines, including the projections of th e reference line, shall be drawn in the vertical 
median plane of the seat or seating position c oncerned (see annex 5 to this Regulation). 
L 373/14 EN Official Journal of the European Union 27.12.2006 
  
6.4.3.2. The displaced reference line is determined by  applying to the part simulating the back of the 
manikin referred to in annex 3 to this Re gulation an initial force producing a rearward 
moment of 37,3 daNm about the R point. 
 6.4.3.3. By means of a spherical headform 165 mm in diameter an initial force producing a moment 
of 37,3 daNm about the R point is applied at ri ght angles to the displaced reference line at a 
distance of 65 mm below the top of the head rest raint, the reference line being kept in its 
displaced position in accordance with paragraph 6.4.3.2. 
 6.4.3.3.1. If the presence of gaps prevents the appli cation of the force prescribed in paragraph 6.4.3.3. 
at 65 mm from the top of the head restraint, th e 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 5.8. and 5.9. above, the test shall be repeated by 
applying to each gap, using a sphere of 165 mm 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 37,3 daNm 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 paragr aph 5.11. above, between the tangent Y and the 
displaced reference line is measured. 
 
6.4.3.6. To check the effectiveness of the h ead restraint, the ini tial load specified in 
paragraphs 6.4.3.3. and 6.4.3.3.2. is incr eased to 89 daN 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 refe rence 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 pl ane specified in paragraph 6.4.3.1. above. 
 
 The tangent S to the top of the head restrain t 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 re quirements of paragraph 5.5. above. 
 
6.6. Determination of the width of the head restraint
 
 (see figure 2 of annex 4 to this Regulation)  
27.12.2006 EN Official Journal of the European Union L 373/15 
 6.6.1. The plane S1, perpendicular to the refe rence line and situated 65 mm below the tangent S 
defined in paragraph 6.5.3. a bove, determines a section in the head restraint bounded by the 
outline C. 
 6.6.2. The width of the head restraint to be  taken into consideration in implementing the 
requirements of paragraph 5.10. above, is the distance "L" measured in the plane S1 between the vertical longitudinal planes P and P'. 
 
6.6.3. The width of the head restraint shall if necessary also be determined in the plane 
perpendicular to the reference line 635 mm above  the R point of the seat, this distance being 
measured along the reference line. 
 
6.7. Determination of distance "a" of head restraint gaps
 
 (see annex 8 to this Regulation)  6.7.1. The distance "a" shall be determined for each gap and in relation to the front face of the 
head restraint, by means of a sphere having a diameter of 165 mm. 
 
6.7.2. The sphere shall be put into contact with the gap in a point of the gap area which allows the 
maximum sphere intrusion, consider ing no load is to be applied. 
 6.7.3. The distance between the two points of contact  of the sphere with the gap will constitute the 
distance "a" to be considered for the evaluati on of the provisions unde r paragraphs 5.8. and 
5.9. above. 
 6.8. Tests for checking energy dissipation on the seat-back and head
 restraint  
 6.8.1. The surfaces of the rear parts of seats to be  checked are those situated in the areas defined 
below which can be contacted by a 165 mm diamet er sphere when the seat is mounted in the 
vehicle. 
 6.8.1.1. Area 1  6.8.1.1.1. In the case of separate seat s without head restraints, this area shall include the rear part of 
the seat-back between the longitudinal vertical planes situated at 100 mm on either side of 
the longitudinal median plane of the seat centr e line, and above a plane perpendicular to 
the reference line 100 mm belo w the top of the seat-back. 
 6.8.1.1.2. In the case of bench seats without head  restraints, this area shall extend between the 
longitudinal vertical planes situated at 100 mm on either side of the longitudinal median 
plane of each designated outboard seating pos ition defined by the manufacturer and above 
a plane perpendicular to the reference li ne 100 mm below the top of the seat-back. 
 6.8.1.1.3. In the case of seats or bench seats with h ead restraints, this area shall extend between the 
longitudinal vertical planes, on either side of and 70 mm from the longitudinal median 
plane of the seat or of the seating position concerned and situated above the plane 
perpendicular to the reference line 635 mm from the R point.  For the test, the head restraint, if adjustable shall be placed in the most unfavourable position (generally the 
highest) permitted by its adjustment system. 
 
6.8.1.2. Area 2 
 
L 373/16 EN Official Journal of the European Union 27.12.2006 
 6.8.1.2.1. In the case of seats or bench seats without  head restraints and seats or bench seats with 
detachable or separate head restraints, area 2 shall extend above a plane perpendicular to 
the reference line 100 mm distant from the top of  the seat-back, other than parts of area 1. 
 6.8.1.2.2. In the case of seats or bench seats with in tegrated head restraints, area 2 shall extend above 
a plane perpendicular to the reference line 440 mm distant from the R point of the seat or 
of the seating position concerned, other than parts of area 1. 
 
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 5.1.4.1. 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 Re gulation 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 competent authority which granted type approval may at any time verify the 
conformity control methods applied for each pr oduction 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 vehi cle type pursuant to this Regulation may be 
withdrawn if the requirements laid down in pa ragraph 7.1. above are not complied with or 
if the vehicles fail in the checks pr escribed 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 notif y 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 
 
27.12.2006 EN Official Journal of the European Union L 373/17 
 9.1. Every modification of the vehicle type with  respect to the seats, their anchorages and/or 
their head restraints shall be notified to th e administrative department which approved the 
vehicle type.  The department may then either: 
 9.1.1. consider that the modifications made are un likely 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 suffi ciently unimportant for the results specified in 
paragraph 6.2., 6.3. and 6.4. above to be veri fied by calculations based on the approval test 
results; or 
 9.1.3. require a further report from the techni cal service responsible for conducting the tests. 
 
9.2. Confirmation or refusal of approval, spec ifying the modifications, shall be communicated 
to the Parties to the Agreement applying this  Regulation by means of the procedure laid 
down in paragraph 4.3. above. 
 9.3. The competent authority issuing the extension of approval shall assign a series number for 
such an extension and inform thereof the othe r Parties to the 1958 Agreement applying this 
Regulation by means of a communication form conforming to the model in annex 1 to this Regulation. 
 10. PRODUCTION DEFINITELY DISCONTINUED 
 
10.1. If the holder of the approval completely ceases to manufacture a device approved in 
accordance with this Regulation, he shall so  inform the authority which granted the 
approval.  Upon receiving the relevant communi cation that authority shall inform thereof 
the other Parties to the 1958 Agreement applying this Regulation by means of a 
communication form conforming to the model in annex 1 to this Regulation. 
 11. INSTRUCTIONS FOR USE  11.1. For seats fitted with adjustab le head restraints, the manufacturers shall provide instructions 
on how to operate, adjust, lock and, where applicable, remove the head restraints. 
 
12. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR 
CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS 
  The Parties to the Agreement applying this Regulation shall communicate to the United 
Nations Secretariat the names and addresses of the technical services responsible for 
conducting approval tests and of the administ rative departments which grant approval and 
to which forms certifying approval or extens ion or refusal or withdrawal of approval, 
issued in other countries, are to be sent. 
 13.  TRANSITIONAL PROVISIONS 
 
13.1.  As from the official date of entry into force of the 06 series of amendments, no Contracting 
Party applying this Regulation shall refuse to  grant ECE approvals under this Regulation as 
amended by the 06 series of amendments. 
 
13.2.  As from 1 October 1999, Contracting Par ties applying this Regulation shall grant ECE 
approvals only if the requirements of this Regulation, as amended by the 06 series of 
amendments, are satisfied. 
L 373/18 EN Official Journal of the European Union 27.12.2006 
  
13.3.  As from 1 October 2001, Contracting Pa rties applying this Regulation may refuse to 
recognize approvals which were not granted in accordance with the 06 series of amendments to this Regulation. 
 13.4.  As from the official date of entry into force of the 07 series of amendments, no Contracting 
Party applying this Regulation shall refuse to  grant ECE approvals under this Regulation as 
amended by the 07 series of amendments. 
 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 ECE 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 Re gulation 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. 
__________ 
27.12.2006 EN Official Journal of the European Union L 373/19 
 
 Annex 1  
 
 COMMUNICATION   (maximum format:  A4 (210 x 297 mm))  
issued by: Name of administration: 
....................... 
....................... ....................... 
  
 
concerning: 2
/ APPROVAL GRANTED 
APPROVAL EXTENDED APPROVAL REFUSED APPROVAL WITHDRAWN PRODUCTION DEFINITELY DISCONTINUED 
 
of a vehicle type with regard to the strength of th e seats and their anchorages, in the case either of seats 
fitted or capable of being fitted with head restraints or of seats not capable of being fitted with such devices 
and the characteristics of head rest raints pursuant to Regulation No. 17 
 
Approval No.  ....................        Extension No.  ..................... 
 1. Trade name or mark of the motor vehicle  ................................  2. Vehicle type  ........................................................... 
 
3. Manufacturer's name a nd address  ........ ................ ................ 
 4. If applicable, name and address of the manufacturer's representative   ......................................................................... 
 
5. Description of seat s  ........................ ........................... 
 6. Number of seats fitted or capable of being fitted w ith head restraints, adjustable or not adjustable  
........................................... 
 
 .........................................................................  7. Description of the adjustment, displacement and locking systems of the seat or of its parts and a 
description of occupant protection system against displacement of luggage.......................................... 
 
 .............................................................................................................................. .................................. 
8. Description of seat an chorage  ............. ................. ............. 
 9. Longitudinal position of the seats during the tests  ..................... 
 
10. Vehicle submitted for approval on  ....................................... 
 11. Technical service responsible for conducting approval tests  ............. 
L 373/20 EN Official Journal of the European Union 27.12.2006 
  
12. Date of report issued by that service  ................................... 
 13. No. of report issued by that service  ....................................  14. Remarks  .................................................................  
15. Approval is granted/re fused/extended/withdrawn 2
/  ....................... 
 16. Reason(s) of extension (if applicable)  ..................................  17. Position of approval mark on the vehicle  ................................ 
 
18. Place  ......................... ...................... .................... 
 19. Date  ....................................................................  20. Signature  ............................................................... 
 
21. The following documents, bearing the appr oval number shown above, are annexed to this 
communication: 
  ... drawings, diagrams and plans of the seats, their anchorage on the vehicle, the adjustment 
and displacement systems of the seats and their parts, and their locking devices; 
  ... photographs of the seats, their anchorages, th e 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 sh own on all drawings, di agrams and photographs. 
_____________ 
___________________  1
/ Distinguishing number of the country whic h has/granted/extended/ refused/withdrawn 
approval (see approval provisions in the Regulation). 
  2
/ Strike out what does not apply. 
27.12.2006 EN Official Journal of the European Union L 373/21 
 Annex 2  
 
ARRANGEMENTS OF APPROVAL MARKS 
 
Model A  
 
(see paragraphs 4.4., 4.4.1., 4.4.2.  and 4.4.3. of this Regulation) 
 
Vehicle with at least one seat fitted or capable 
of being fitted with a head restraint 
  
 
 
 
 
a = 8 mm min 
   The above approval mark when affixed to a vehicl e shows that the vehicle type concerned, with 
regard to the strength of the seats fitted or capable of being fitted with head restraints and with regard to 
characteristics of the head restraints, has been approved in the Netherlands (E4) pursuant to 
Regulation No. 17, under the approval number 072439.  The first two digits of the approval number 
indicate that the Regulation already contained the 07 se ries of amendments at the time of approval.  The 
above approval mark also shows that the vehicle t ype 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. 
 
L 373/22 EN Official Journal of the European Union 27.12.2006 
  Model B  
 
 (see paragraphs 4.4.; 4.4.1. a nd 4.4.2. of this Regulation) 
  Vehicle with seats not fitted or not capable  of being fitted with head restraints  
 
 
 
 
a = 8 mm min 
   The above approval mark when affixed to a vehicl e shows that the vehicle type has seats not fitted 
or capable of being fitted with head restraints, and h as, with regard to the strength of the seats and their 
anchorages, been approved in the Netherlands (E4) pursuant to Regulation No. 17 under the approval 
number 072439.  The first two digits of the approval number indicate that the Regulation already contained 
the 07 series of amendments at the time of approval.   
 
27.12.2006 EN Official Journal of the European Union L 373/23 
  Model C  
 
 (see paragraph 4.5. of this Regulation)   Vehicle with at least one seat fitted or capable  of being fitted with a head restraint  
 
 
 
 
a = 8 mm min. 
   The above approval mark when affixed to a vehicle shows that the vehicle type has at least one seat 
fitted or capable of being fitted with a head restraint,  and was approved in the Netherlands (E4) pursuant to 
Regulations Nos. 17 and 33. 1
/ 
  The approval numbers indicate that, on the dat es when approval was granted, Regulation No. 17 
included the 07 series of amendments but Regulation No. 33 was still in its original form.  The above 
approval mark also shows that the vehicle type was a pproved pursuant to Regulation No. 17 with regard to 
the strength of any seats on the vehicle which are not fitte d or capable of being fitted with head restraints. 
 
L 373/24 EN Official Journal of the European Union 27.12.2006 
  Model D  
 
 (see paragraph 4.5. of this Regulation)   Vehicle with seats not fitted or not capable  of being fitted with head restraints  
 
 
 
 
a = 8 mm min 
   The above approval mark when affixed to a vehicl e shows that the vehicle type has seats not fitted 
or capable of being fitted with head restraints, a nd was approved in the Netherlands (E4) pursuant to 
Regulations Nos. 17 and 33. 1
/  The approval numbers indicate that, on the dates when approval was 
granted, Regulation No. 17 included the 07 series of amendments but Regulation No. 33 was still in its 
original form.  
______________ 
 
 
____________________  1
/ The second number is given merely as an example. 
 
___________ 
  
27.12.2006 EN Official Journal of the European Union L 373/25 
 Annex 3  
 
PROCEDURE FOR DETERMINING THE "H" POINT AND THE ACTUAL 
TORSO ANGLE FOR SEATING POSITIONS IN MOTOR VEHICLES 
 
1. PURPOSE  
 The procedure described in this annex is u sed to establish the "H" point location and the 
actual torso angle for one or several seating po sitions in a motor vehicle and to verify the 
relationship of measured data to design speci fications given by the vehicle manufacturer. 1
/ 
 2. DEFINITIONS 
 
 For the purposes of this annex:  2.1. "Reference data
" means one or several of the followi ng characteristics of a seating position: 
 2.1.1. the "H" point and the "R" point and their relationship, 
 
2.1.2. the actual torso angle and the design torso angle and their relationship.  2.2. "Three-dimensional 'H' point machine
" (3-D H machine) means the device used for the 
determination of "H" points and actual torso angles.  This device is described in appendix 1 
to this annex; 
 2.3. "'H' point
" means the pivot centre of the torso and thigh of the 3-D H machine installed in 
the vehicle seat in accordance with paragraph 4.  below.  The "H" point is located in the 
centre of the centreline of the device which is between the "H" point sight buttons on either 
side of the 3-D H machine.  The "H" point corresponds theoretically to the "R" point (for 
tolerances see paragraph 3.2.2. below).  Once determined in accordance with the procedure 
described in paragraph 4., the "H" point is c onsidered fixed in relation to the seat-cushion 
structure and to move with it when the seat is adjusted; 
 2.4. "'R' point
" or "seating reference point " means a design point defined by the vehicle 
manufacturer for each seating position and establis hed with respect to the three-dimensional 
reference system; 
 2.5. "Torso-line
" means the centreline of the probe of the 3-D H machine with the probe in the 
fully rearward position; 
 
2.6. "Actual torso angle " means the angle measured between a vertical line through the "H" 
point and the torso line using the back angl e quadrant on the 3-D H machine.  The actual 
torso angle corresponds theoretically to the design torso angle (for tolerances see 
paragraph 3.2.2. below); 
 
2.7. "Design torso angle " means the angle measured between a vertical line through the "R" 
point and the torso line in a position which corresponds to the design position of the 
seat-back established by the vehicle manufacturer; 
 
                         
1/ In any seating position other than front seats where the "H" point cannot be determined using the 
"three-dimensional 'H' point machine" or procedures, the "R" point indicated by the manufacturer may be taken as a reference at the discretion of the competent authority. 
 
L 373/26 EN Official Journal of the European Union 27.12.2006 
 2.8. "Centre plane of occupant " (C/LO) means the median plane of the 3-D H machine 
positioned in each designated seating position; it is represented by the co-ordinate of the 
"H" point on the "Y" axis.  For individual seats, the centre plane of the seat coincides with 
the centre plane of the occupant.  For other seats, the centre plane of the occupant is 
specified by the manufacturer; 
 2.9. "Three dimensional reference system
" means a system as described in appendix 2 to this 
annex; 
 2.10. "Fiducial marks
" are physical points (holes, surfaces, marks or indentations) on the vehicle 
body as defined by the manufacturer; 
 
2.11. "Vehicle measuring attitude " means the position of the vehicle as defined by the 
co-ordinates of fiducial marks in the three-dimensional reference system. 
 3. REQUIREMENTS  3.1. Data presentation
 
 
 For each seating position where reference data  are required in order to demonstrate 
compliance with the provisions of the present Regulation, all or an appropriate selection of 
the following data shall be presented in the fo rm indicated in appendix 3 to this annex: 
 
3.1.1. the co-ordinates of the "R" point relativ e to the three-dimensional reference system; 
 3.1.2. the design torso angle;  3.1.3. all indications necessary to adjust the seat  (if it is adjustable) to the measuring position set 
out in paragraph 4.3. below. 
 3.2. Relationship between measur ed data and design specifications
 
 3.2.1. The co-ordinates of the "H" point and the value of the actual torso angle obtained by the 
procedure set out in paragraph 4. below shall be compared, respectively, with the 
co-ordinates of the "R" point and the value of the design torso angle indicated by the vehicle 
manufacturer. 
 3.2.2. The relative positions of the "R" point a nd the "H" point and the relationship between the 
design torso angle and the actual torso angle sh all be considered satisfactory for the seating 
position in question if the "H" point, as defined by its co-ordinates, lies within a square of 
50 mm side length with horizontal and vertical  sides whose diagonals intersect at the "R" 
point, and if the actual torso angle is within 5 degree of the design torso angle. 
 3.2.3. If these conditions are met, the "R" point a nd the design torso angle, shall be used to 
demonstrate compliance with the provisions of this Regulation. 
 
3.2.4. If the "H" point or the actual torso angle does not satisfy the requirements of 
paragraph 3.2.2. above, the "H" point and the actual torso angle shall be determined twice 
more (three times in all).  If the results of two of these three operations satisfy the requirements, the conditions of para graph 3.2.3. above shall apply. 
 
3.2.5. If the results of at least two of the thr ee operations described in paragraph 3.2.4. above do 
not satisfy the requirements of paragraph 3.2. 2. above, or if the verification cannot take 
27.12.2006 EN Official Journal of the European Union L 373/27 
 place because the vehicle manufacturer has fa iled to supply information regarding the 
position of the "R" point or regarding the design torso angle, the centroid of the three 
measured points or the average of the three m easured angles shall be used and be regarded 
as applicable in all cases where the "R" point or the design torso angle is referred to in this 
Regulation. 
 4. PROCEDURE FOR "H" POINT AND ACTUAL TORSO ANGLE DETERMINATION 
 
4.1. The vehicle shall be preconditioned at the manufacturer's discretion, at a temperature of 
20 ∀ 10 °C to ensure that the seat material reaches room temperature.  If the seat to be 
checked has never been sat upon, a 70 to 80 kg person or device shall sit on the seat twice 
for one minute to flex the cushion and back .  At the manufacturer's request, all seat 
assemblies shall remain unloaded for a minimum period of 30 minutes prior to installation of the 3-D H machine. 
 4.2. The vehicle shall be at the measuri ng attitude defined in paragraph 2.11. above. 
 
4.3. The seat, if it is adjustable, shall be adjust ed first to the rearmost normal driving or riding 
position, as indicated by the vehicle manufacturer, taking into consideration only the longitudinal adjustment of the seat, excludi ng seat travel used for purposes other than 
normal driving or riding positi ons.  Where other modes of seat adjustment exist (vertical, 
angular, seat-back, etc.) these will be then adjust ed to the position specified by the vehicle 
manufacturer.  For suspension seats, the ve rtical position shall be rigidly fixed 
corresponding to a normal driving position as specified by the manufacturer. 
 4.4. The area of the seating position contacted by the 3-D H machine shall be covered by a 
muslin cotton, of sufficient size and appropriate  texture, described as a plain cotton fabric 
having 18,9 threads per cm
2 and weighing 0,228 kg m2 or knitted or non-woven fabric 
having equivalent characteristics. 
  If the test is run on a seat outside the vehicle,  the floor on which the seat is placed shall have 
the same essential characteristics 2
/ as the floor of the vehicle in which the seat is intended 
to be used. 
 
4.5. Place the seat and back assembly of the 3- D H machine so that the centre plane of the 
occupant (C/LO) coincides with the centr e plane of the 3-D H machine.  At the 
manufacturer's request, the 3-D H machine may be moved inboard with respect to the C/LO if the 3-D H machine is located so far outboa rd that the seat edge will not permit levelling 
of the 3-D H machine. 
 4.6. Attach the foot and lower leg assemblies to the seat pan assembly, either individually or by 
using the T-bar and lower leg assembly.  A line through the "H" point sight buttons shall be 
parallel to the ground and perpendicular to the longitudinal centre plane of the seat. 
 
4.7. Adjust the feet and leg positions of the 3-D H machine as follows:  4.7.1. Designated seating position:  driver and outside front passenger. 
 4.7.1.1. Both feet and leg assemblies shall be move d forward in such a way that the feet take up 
natural positions on the floor, between the ope rating pedals if necessary.  Where possible 
the left foot shall be located approximately th e same distance to the left of the centre plane 
                         
2/ Tilt angle, height difference with a seat mounting, surface texture, etc. 
L 373/28 EN Official Journal of the European Union 27.12.2006 
 of the 3-D H machine as the right foot is to the right.  The spirit level verifying the 
transverse orientation of the 3-D H machine is brought to the horizontal by readjustment of 
the seat pan if necessary, or by adjusting the leg and foot assemblies towards the rear.  The 
line passing through the "H" point sight buttons shall be maintained perpendicular to the 
longitudinal centre plane of the seat. 
 4.7.1.2. If the left leg cannot be kept parallel to th e right leg and the left foot cannot be supported by 
the structure, move the left foot until it is supported.  The alignment of the sight buttons 
shall be maintained. 
 4.7.2. Designated seating position:  outboard rear  
 For rear seats or auxiliary seats, the legs are located as specified by the manufacturer.  If the 
feet then rest on parts of the floor which are at different levels, the foot which first comes into contact with the front seat shall serve as a reference and the other foot shall be so 
arranged that the spirit level giving the tran sverse orientation of the seat of the device 
indicates the horizontal. 
 
4.7.3. Other designated seating positions: 
  The general procedure indicated in paragraph 4.7.1. above shall be followed except that the 
feet shall be placed as specified by the vehicle manufacturer. 
 
4.8. Apply lower leg and thigh weights and level the 3-D H machine. 
 4.9. Tilt the back pan forward against the forw ard stop and draw the 3-D H machine away from 
the seat-back using the T-bar.  Reposition th e 3-D H machine on the seat by one of the 
following methods: 
 
4.9.1. If the 3-D H machine tends to slide rear ward, use the following procedure.  Allow the 3-
D H machine to slide rearward until a forward horizontal restraining load on the T-bar is no longer required i.e. until the seat pan contacts the seat-back.  If necessary, reposition the lower leg. 
 
4.9.2. If the 3-D H machine does not tend to slid e rearward, use the following procedure.  Slide 
the 3-D H machine rearwards by applying a hor izontal rearward load to the T-bar until the 
seat pan contacts the seat-back (see figure 2 of appendix 1 to this annex). 
 
4.10. Apply a 100 ∀ 10 N load to the back and pan asse mbly of the 3-D H machine at the 
intersection of the hip angle quadrant and the T-bar housing.  The direction of load 
application shall be maintained along a line p assing by the above intersection to a point just 
above the thigh bar housing (see figure 2 of a ppendix 1 to this annex).  Then carefully 
return the back pan to the seat-back.  Care mu st be exercised throughout the remainder of 
the procedure to prevent the 3-D H machine from sliding forward. 
 4.11. Install the right and left buttock weights a nd then, alternately, the eight torso weights.  
Maintain the 3-D H machine level. 
 4.12. Tilt the back pan forward to release the te nsion on the seat-back.  Rock the 3-D H machine 
from side to side through 10 degrees arc (5 degr ees to each side of the vertical centre plane) 
for three complete cycles to release any accu mulated friction between the 3-D H machine 
and the seat. 
 
27.12.2006 EN Official Journal of the European Union L 373/29 
  During the rocking action, the T-bar of th e 3-D H machine may tend to diverge from the 
specified horizontal and vertical alignment.  The T-bar must therefore be restrained by 
applying an appropriate lateral load during the rocking motions.  Care shall be exercised in 
holding the T-bar and rocking the 3-D H machin e to ensure that no inadvertent exterior 
loads are applied in a vertical or fore and aft direction. 
  The feet of the 3-D H machine are not to be r estrained or held during this step.  If the feet 
change position, they should be allowed to  remain in that attitude for the moment. 
  Carefully return the back pan to the seat-b ack and check the two spirit levels for zero 
position.  If any movement of the feet has o ccurred during the rocking operation of the 3-
D H machine, they must be repositioned as follows: 
 
 Alternately, lift each foot off the floor the minimum necessary amount until no additional 
foot movement is obtained.  During this lifting, the feet are to be free to rotate; and no forward or lateral loads are to be applied.  When each foot is pl aced back in the down 
position, the heel is to be in contact  with the structure designed for this. 
 
 Check the lateral spirit level for zero position; if necessary, apply a lateral load to the top of 
the back pan sufficient to level the 3-D H machine's seat pan on the seat. 
 4.13. Holding the T-bar to prevent the 3-D H m achine from sliding forward on the seat cushion, 
proceed as follows: 
 
 (a) return the back pan to the seat-back;   (b) alternately apply and release a horizontal rearward load, not to exceed 25 N, to the 
back angle bar at a height approximately at the centre of the torso weights until the 
hip angle quadrant indicates that a stable pos ition has been reached after load release.  
Care shall be exercised to ensure that no exterior downward or lateral loads are applied to the 3-D H machine.  If another level adjustment of the 3-D H machine is 
necessary, rotate the back pan forward, re-level, and repeat the procedure from 
paragraph 4.12. 
 
4.14. Take all measurements: 
 4.14.1. The co-ordinates of the "H" point are m easured with respect to the three-dimensional 
reference system. 
 
4.14.2. The actual torso angle is read at the b ack angle quadrant of the 3-D H machine with the 
probe in its fully rearward position. 
 4.15. If a re-run of the installation of the 3-D H machine is desired, the seat assembly should 
remain unloaded for a minimum period of 30 minutes prior to the re-run.  The 3-D H machine should not be left loaded on the seat assembly longer than the time required to 
perform the test. 
 4.16. If the seats in the same row can be regarded  as similar (bench seat, identical seats, etc.) only 
one "H" point and one " actual torso angle" sha ll be determined for each row of seats, the 3-
D H machine described in appendix 1 to this  annex being seated in a place regarded as 
representative for the row.  This place shall be: 
 4.16.1. in the case of the front row, the driver's seat; 
L 373/30 EN Official Journal of the European Union 27.12.2006 
  
4.16.2. in the case of the rear row or rows, an outer seat. 
 
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27.12.2006 EN Official Journal of the European Union L 373/31 
  Annex 3 - Appendix 1  
 
 DESCRIPTION OF THE THREE-DIMENSIONAL "H" POINT MACHINE ∗/ 
  (3-D H machine) 
 
1. Back and seat pans
 
  The back and seat pans are constructed of reinfo rced plastic and metal; they stimulate the human 
torso and thigh and are mechanically hinged at the "H" point.  A quadrant is fastened to the probe 
hinged at the "H" point to measure the actual torso a ngle.  An adjustable thigh bar, attached to the 
seat pan, establishes the thigh centreline and ser ves as a baseline for the hip angle quadrant. 
 2. Body and leg elements
 
  Lower leg segments are connected to the seat pan a ssembly at the T-bar joining the knees, which is a 
lateral extension of the adjustable thigh bar.  Quad rants are incorporated in the lower leg segments to 
measure knee angles.  Shoe and foot assemblies are cal ibrated to measure the foot angle.  Two spirit 
levels orient the device in space.  Body element weights are placed at the corresponding centres of 
gravity to provide seat penetration equivalent to  a 76 kg male.  All joints of the 3-D H machine 
should be checked for free movement without encountering noticeable friction. 
 
                         
∗/ For details of the construction of the 3-D H machin e refer to Society of Auto motive Engineers (SAE), 400 
Commonwealth Drive, Warrendale, Pennsylv ania 15096, United St ates of America. 
 
 The machine corresponds to that described in ISO Standard 6549 : 1980. 
 
L 373/32 EN Official Journal of the European Union 27.12.2006 
  
Figure 1  - 3-D H machine elements designation 
27.12.2006 EN Official Journal of the European Union L 373/33 
 Figure 2  - Dimensions of the 3-D H machine elements and load distribution 
(Dimensions in millimeters) 
L 373/34 EN Official Journal of the European Union 27.12.2006 
  Annex 3 - Appendix 2  
 
 THREE-DIMENSIONAL REFERENCE SYSTEM  1. The three-dimensional reference system is defined by three orthogonal planes established by the 
vehicle manufacturer (see figure). ∗
/ 
 
2. The vehicle measuring attitude is established by positioning the vehicle on the supporting surface 
such that the co-ordinates of the fiducial ma rks correspond to the values indicated by the 
manufacturer. 
 
3. The co-ordinates of the "R" point and the "H" point are established in relation to the fiducial marks 
defined by the vehicle manufacturer. 
  
Figure
 - Three-dimensional reference system 
 
                         
∗/ The reference system corresponds to ISO standard 4130 : 1978. 
27.12.2006 EN Official Journal of the European Union L 373/35 
 Annex 3 - Appendix 3  
 
REFERENCE DATA CONCERNING SEATING POSITIONS 
 1. Coding of reference data   Reference data are listed consecutively for each seating position.  Seating positions are identified 
by a two-digit code.  The first digit is an Arabic numeral and designates the row of seats, 
counting from the front to the rear of the vehicle.  The second digit is a capital letter which designates the location of the seating position in a row, as viewed in the direction of forward 
motion of the vehicle; the following letters shall be used: 
 
     L  =  l e f t  
     C = centre      R = right  2. Description of vehicle measuring attitude  
2.1. Co-ordinates of fiducial marks 
 X ............................  Y ............................  Z ............................  
3. List of reference data 
 3.1. Seating position: ......................................  3.1.1. Co-ordinates of "R" point 
 X ........................... 
 Y ...........................  Z ...........................  3.1.2. Design torso angle: ....................................  
3.1.3. Specification for seat adjustment ∗
/ 
 horizontal: .......................  vertical: .........................  angular: .......................... 
 torso angle: ...................... 
 Note
:  List reference data for further seating positions under 3.2., 3.3., etc. 
 
___________ 
 
                         
∗/ Strike out what does not apply. 
L 373/36 EN Official Journal of the European Union 27.12.2006 
 Annex 4  
 
DETERMINATION OF THE HEIGHT AND WIDTH OF HEAD RESTRAINTS 
 
Figure 1  
   HEIGHT 
27.12.2006 EN Official Journal of the European Union L 373/37 
  
 
 
Figure 2  
   
 
L 373/38 EN Official Journal of the European Union 27.12.2006 
 Annex 5  
 
DETAILS OF LINES AND MEASUREMENTS TAKEN DURING TESTS 
 
 
 
 
 
1. Original unloaded position. 
2a.  Displaced position by applying to the manikin’s back a moment of 373 Nm 
  about the R point, defining the pos ition of the displaced reference line r 1. 
2b. Displaced position by applying to the 165 mm sphere a force F producing a moment of 373 Nm 
about the R point, keeping th e displaced reference line r 1 in place. 
3.   Position after displacement by  the force F incr eased to 890 N. 
 
27.12.2006 EN Official Journal of the European Union L 373/39 
  
 
  
 
.
 
 
  
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L 373/40 EN Official Journal of the European Union 27.12.2006 
  
Annex 6  
 
TEST PROCEDURE FOR CHECKING ENERGY DISSIPATION 
 1. Installation, test apparatus, recording instruments and procedure
 
 
1.1. Setting up  
  The seat, as mounted in the vehicle, shall be  firmly secured to the test bench with the 
attachment parts provided by the manufacturer, so as to remain stationary when the impact 
is applied. 
 
 The seat-back, if adjustable, shall be locked in  the position specified in paragraph 6.1.1. of 
this Regulation. 
  If the seat is fitted with a head restraint, th e head restraint shall be mounted on the seat-back 
as in the vehicle.  Where the head restraint is separate, it shall be secured to the part of the 
vehicle structure to which it is normally attached. 
  If the head restraint is adjustable, it sha ll be placed in the most unfavourable position 
allowed by its adjusting systems. 
 
1.2. Test apparatus
 
 1.2.1. This apparatus consists of a pendulum w hose pivot is supported by ball-bearings and whose 
reduced mass ∗
/ at its centre of percussion is 6,8 kg.  The lower extremity of the pendulum 
consists of a rigid headform 165 mm in diameter  whose centre is identical with the centre of 
percussion of the pendulum. 
 1.2.2. The headform shall be fitted with tw o accelerometers and a speed-measuring device, all 
capable of measuring values in the direction of impact. 
 
1.3. Recording instruments
 
  The recording instruments used shall be su ch that measurements can be made with the 
following degrees of accuracy: 
1.3.1.  Acceleration: 
 
  accuracy = +
 5 % of the actual value; 
   frequency class of data channel:  class 600 corresponding to 
ISO Standard 6487 (1980); 
 
  cross-axis sensitivity =  < 5 % of the lowest point on the scale. 
 
                         
∗/ The relationship of the reduced mass "m r" of the pendulum to the total mass "m" of the pendulum at a distance 
"a" between the centre of percussion an d the axis of rotation and at a distan ce "l" between the centre of gravity and 
the axis of rotation is given by the formula: 
mml
ar=  
 
27.12.2006 EN Official Journal of the European Union L 373/41 
 1.3.2. Speed: 
 
  accuracy:  +  2,5 % of the actual value; 
   sensitivity:  0,5 km/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 paragr aph 6.8.1.2. of this 
Regulation, on surfaces exhibiting ra dii of curvature less than 5 mm. 
 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 possi bly in area 2 as defined in paragraph 6.8.1.2. 
of this Regulation, on surfaces exhibiting radii of curvature less than 5 mm. 
 1.4.2.1. For the rear face, the direction of imp act 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 respectivel y 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 24,1 km/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 
decelerometers. 
 
3. Equivalent procedures
 (see paragraph 6.9. of this Regulation). 
 
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L 373/42 EN Official Journal of the European Union 27.12.2006 
 Annex 7  
 
METHOD FOR TESTING THE STRENGTH OF SEAT ANCHORAGES 
AND THEIR ADJUSTMENT, LOCKING AND DISPLACEMENT SYSTEMS 
 1. Test of resistance to inertia effects
 
 
1.1. The seats to be tested shall be mounted on the vehicle body for which they are designed.  
This vehicle body shall be firmly anchored on a test trolley as prescribed in the following paragraphs. 
 1.2. The method used for anchoring the vehicle body on the test trolley shall not result in a 
reinforcement of the seat anchorages. 
 1.3. The seats and their parts shall be adjusted and locked as prescribed in paragraph 6.1.1. and 
in one of the positions described in paragra ph 6.3.3. or 6.3.4. of this Regulation. 
 1.4. If the seats of a group do not present essential di fferences in the sense of paragraph 2.2. of 
this Regulation, the tests prescribed in paragra phs 6.3.1. and 6.3.2. of this Regulation may 
be carried out with one seat adjusted to its foremost position and the other seat adjusted to 
its rearmost position. 
 1.5. The trolley deceleration is measured wi th data channels of frequency class (CFC) 60 
corresponding to the characteristics of International Standard ISO 6487 (1980). 
 2. Collision test of the complete vehicle against a rigid barrier
 
 2.1. The barrier shall consist of a block of rein forced concrete of not less than 3 m width, not 
less than 1,5 m height and not less than 0,6 m thickness.  The front face shall be 
perpendicular to the final part of the run-up track and shall be covered with plywood boards 
19 ∀ 1 mm thick.  At least 90 tonnes of earth shall be compressed behind the block of 
reinforced concrete.  The barrier of reinfo rced concrete and earth may be replaced by 
obstacles having the same front surface, provided that they give equivalent results. 
 
2.2. At the moment of impact the vehicle shall run free.  It shall reach the obstacle on a course 
perpendicular to the collision wall; the maximu m lateral misalignment allowed between the 
vertical median line of the front of the vehicle and the vertical median line of the collision 
wall shall be ∀ 30 cm; at the moment of impact the vehicle shall no longer be subjected to 
the action of any additional steering or prope lling device.  The speed on impact shall be 
between 48,3 km/h and 53,1 km/h. 
 2.3. The fuel feed system shall be filled to at least 90 per cent of its capacity with fuel or an 
equivalent liquid. 
 
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27.12.2006 EN Official Journal of the European Union L 373/43 
 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 ga p area which allows the maximum sphere intrusion, 
without exerting any load. 
  
L 373/44 EN Official Journal of the European Union 27.12.2006 
  
 
     
 
    
 
     
 
    
 
    
 
  
   
 
  
Figure 2
. Example of vertical gaps 
 
 
Note:  Section A-A is to be made in a point of the ga p area which allows the maximum sphere intrusion, 
without exerting any load. 
 
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27.12.2006 EN Official Journal of the European Union L 373/45 
 Annex 9  
 
TEST PROCEDURE FOR DEVICES INTENDED TO PROTECT THE OCCUPANTS 
AGAINST DISPLACEMENT OF LUGGAGE 
 1.  Test blocks  
Rigid blocks, with the centre of inertia in the geometric centre. 
 
Type 1
 
 
Dimensions:  300 mm x 300 mm x 300 mm 
all edges and corners rounded to 20 mm 
 
Mass:   18 kg 
 
Type 2  
 
Dimensions:  500 mm x 350 mm x 125 mm 
all edges and corners rounded to 20 mm 
 
Mass:   10 kg 
 
2.  Test preparation 
 2.1.  Test of seat-backs (see figure 1)  2.1.1.  General requirements 
 
2.1.1.1.  At the option of the car manufacturer, pa rts whose hardness is lower than 50 Shore A can 
be removed from the tested seat and head restraint for the tests. 
 2.1.1.2.  Two type 1 test blocks shall be placed on  the floor of the luggage compartment.  In order 
to determine the location of the test blocks in the longitudinal direction, they shall first be 
positioned such that their front side contacts th at part of the vehicle which constitutes the 
forward boundary of the luggage compartment and that their lower side rests on the floor of the luggage compartment.  They shall th en be moved backwards and parallel to the 
longitudinal median plane of the vehicle un til their geometrical centre has traversed a 
horizontal distance of 200 mm.  If the dimensions of the luggage compartment do not 
allow a distance of 200 mm and if the rear seats are horizontally adjustable, these seats 
shall be moved forward to the limit of the ad justment range intended for normal occupant 
use, or to the position resulting in a distance of 200 mm, whichever is less.  In other cases, the test blocks shall be placed as far as possible behind the rear seats.  The distance 
between the longitudinal median plane of the vehicle and the inward facing side of each 
test block shall be 25 mm to obtain a distance of 50 mm between both blocks. 
 
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 10 mm in front of the rearmost 
possible position of use specified by the manuf acturer (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. 
L 373/46 EN Official Journal of the European Union 27.12.2006 
 
 
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 ca nnot 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 incr ease 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 Serv ice, 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 200 mm 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 installe d 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. 
 
2.2.  Test of partitioning systems 
 
For the test of the partitioning systems above  the seat-backs, the vehicle shall be fitted 
with a fixed raised test floor having a load su rface that locates the centre of gravity of the 
test block centrally between the top edge of the bordering seat-back (without taking into 
account the head restraints) and the bottom edge of the roof lining.  A type 2 test block is 
placed on the raised test floor with its largest surface 500 x 350 mm, centrally in relation to the longitudinal axis of the vehicle a nd with its surface 500 x 125 mm to the front.  
27.12.2006 EN Official Journal of the European Union L 373/47 
 Partitioning systems behind which the type 2 t est block cannot be installed are exempted 
from this test.  The test block is placed direc tly in contact with the partitioning system.  In 
addition, two type 1 test bloc ks are positioned in accordance with paragraph 2.1. in order 
to perform a simultaneous test on the seat-backs (see figure 2). 
L 373/48 EN Official Journal of the European Union 27.12.2006 
 
 
 
     
 
    
 
     
Figure 2
:  Testing of a partitioning system above the backrest 
  2.2.1.  If the seat-back is fitted with a head restra int, the test must be carried out with the head 
restraint placed in the highest position, if adjustable. 
 
3.  Dynamic testing of seat-backs and partitioning systems used as luggage restraint systems  3.1.  The body of the passenger car shall be anchored securely to a test sled, and this 
anchorage shall not act as reinforcement for seat -backs and the partitioning system.  After 
the installation of the test blocks as described  in paragraph 2.1. or  2.2., the passenger car 
body shall be accelerated as shown in annex 9, appendix, so that at the moment of 
impact, its free running speed is 50 +0/-2 km/h.  With the agreement of the manufacturer, the above described test pulse corridor can be u sed alternatively to fulfil the test of the 
seat strength according to paragraph 6.3.1. 
 
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27.12.2006 EN Official Journal of the European Union L 373/49 
 
Annex 9 - Appendix  
 
SLED DECELERATION CORRIDOR AS A FUNCTION OF TIME 
(Frontal impact) 
   
 
    
 
     
 
    
 
    
 
     
 
    
 
   
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