CONTENTS
A. legislative provisions............................................................................ 3
A.1. NAME OF STANDARD..................................................................................... 3
A.2. COMMENCEMENT.......................................................................................... 3
A.3. REPEAL.............................................................................................................. 3
b. SCOPE................................................................................................................ 3
c. APPLICABILITY AND IMPLEMENTATION................................................... 3
22.1. DEFINITIONS.................................................................................................... 5
22.2. PROVISION, LOCATION AND SIZE.............................................................. 5
22.3. TEST REQUIREMENTS..................................................................................... 5
22.4. DYNAMIC TEST CONDITIONS...................................................................... 5
22.5. STATIC TEST CONDITIONS........................................................................... 6
22.6. ALTERNATIVE STANDARDS.......................................................................... 6
notes ............................................................................................................................ 6
A. legislative provisions
A.1. NAME OF STANDARD
A.1.1. This Standard is the Vehicle Standard (Australian Design Rule 22/00 – Head Restraints) 2006.
A.1.2. This Standard may also be cited as Australian Design Rule 22/00 — Head Restraints.
A.2. COMMENCEMENT
A.2.1. This Standard commences on the day after it is registered.
A.3. REPEAL
A.3.1. This Standard repeals each vehicle standard with the name Australian Design Rule 22/00 — Head Restraints that is:
(a) made under section 7 of the Motor Vehicles Standard Act 1989; and
(b) in force at the commencement of this Standard.
A.3.2. This Standard also repeals each instrument made under section 7 of the Motor Vehicles Standard Act 1989 that creates a vehicle standard with the name Australian Design Rule 22/00 — Head Restraints, if there are no other vehicle standards created by that instrument, or amendments to vehicle standards made by that instrument, that are still in force at the commencement of this Standard.
b. SCOPE
The function of this vehicle standard is to specify requirements for the design of ‘Head Restraints’ so as to limit the severity of injury in the event of rear-end impacts and to ensure that the ‘Head Restraint’ cannot be adjusted too low.
c. APPLICABILITY AND IMPLEMENTATION
C.1. Applicability Summary
This vehicle standard applies to the design and construction of vehicles as set out in the table below.
C.2. Vehicles certified to Australian Design Rule (ADR) 3/03 or a later version need not comply with this rule.
C.3. Applicability Table
| Vehicle Category | ADR Category Code | UNECE Category Code | Manufactured on or After | Acceptable Prior Rules |
| Moped 2 wheels | LA | L1 | N/A | |
| Moped 3 wheels | LB | L2 | N/A | |
| Motor cycle | LC | L3 | N/A | |
| Motor cycle and sidecar | LD | L4 | N/A | |
| Motor tricycle | LE | L5 | | |
| | LEM | | N/A | |
| Enclosed vehicles | LEP & LEG | | 1 March 1991 | Nil |
| All vehicles | LEP & LEG | | 1 July 1992 | Nil |
| Passenger car | MA | M1 | 1 July 1988 | Nil |
| Forward-control passenger vehicle | MB | M1 | 1 July 1988 | Nil |
| Off-road passenger vehicle | MC | M1 | 1 July 1988 | Nil |
| Light omnibus | MD | M2 | | |
| | up to 3.5 tonnes ‘GVM’ and up to 12 seats | MD1 | | 1 July 1988 | Nil |
| | up to 3.5 tonnes ‘GVM’ and more than 12 seats | MD2 | | N/A | |
| | over 3.5 tonnes and up to 4.5 tonnes ‘GVM’ | MD3 | | N/A | |
| | over 4.5 tonnes and up to 5 tonnes ‘GVM’ | MD4 | | N/A | |
| Heavy omnibus | ME | M3 | N/A | |
| Light goods vehicle | NA | N1 | 1 July 1996 | Nil |
| Medium goods vehicle | NB | N2 | | |
| | over 3.5 tonnes up to 4.5 tonnes ‘GVM’ | NB1 | | N/A | |
| | over 4.5 tonnes up to 12 tonnes ‘GVM’ | NB2 | | N/A | |
| Heavy goods vehicle | NC | N3 | N/A | N/A |
| Very light trailer | TA | O1 | N/A | |
| Light trailer | TB | O2 | N/A | |
| Medium trailer | TC | O3 | N/A | |
| Heavy trailer | TD | O4 | N/A | |
22.1. DEFINITIONS
22.1.1. Refer to Vehicle Standard (Australian Design Rule Definitions and Vehicle Categories) 2005.
22.2. PROVISION, LOCATION AND SIZE
22.2.1. A ‘Head Restraint’ must be provided for each front ‘Outboard Seating Position’. It may be provided with vertical and lateral adjustable mounting, and may be removable without the use of tools.
22.2.2. The ‘Head Restraint’ must be so designed that:
22.2.2.1. it presents an impact surface which extends between 2 planes not less than 115 mm apart and normal to the ‘Torso Line’; and
22.2.2.2. the upper boundary of the impact surface is not less than 700 mm above the ‘Seating Reference Point’ measured along the ‘Torso Line’, for any position of adjustment which may be provided.
22.2.3. The width of the ‘Head Restraint’ must be not less than 250 mm for use with bench ‘Seats’ and not less than 170 mm for use with individual ‘Seats’ when measured between heights of 585 mm and 635 mm above the ‘Seating Reference Point’ and along the ‘Torso Line’.
22.2.4. The ‘Head Restraint’ must be so constructed and contoured to decelerate horizontal movements of the head without concentrations of load on it.
22.3. TEST REQUIREMENTS
22.3.1. The ‘Head Restraint’ must meet the conditions of either a dynamic or static test.
22.3.2. In the dynamic test, acceleration of the seat supporting structure of up to 8 times the acceleration due to gravity, must not produce an angular displacement of the ‘Head Reference Line’ of more than 45o.
22.3.3. In the static test the rearmost point of the head form must not be displaced to more than 102 mm perpendicularly ‘Rearward’ of the displaced extended ‘Torso Line’ during the application of the load specified in clause 22.5.3 nor must the ‘Head Restraint’ fail before a failure of the ‘Seat’ back or alternatively before the load has reached 890 N.
22.4. DYNAMIC TEST CONDITIONS
22.4.1. For testing compliance with clause 22.3.2 a dummy having the mass and seated height of a ‘95th Percentile Adult Male’ and with an ‘Approved’ representation of a human articulated neck structure must have lines marked to represent the ‘Torso Line’ and, by extension, the ‘Head Reference Line’.
22.4.2. A dummy meeting the requirements of clause 22.4.1 must be placed in the seating position under test and restrained by a seat belt providing upper torso restraint.
22.4.3. A ‘Forward’ acceleration must be applied to the ‘Seat’ supporting structure. When graphically depicted, the magnitude of the acceleration curve must not be less than that of a half-sine wave having the amplitude of 8 times the acceleration due to gravity and a duration of 80 milliseconds and not more than that of a half-sine wave having an amplitude of 9.6 times the acceleration due to gravity and a duration of 96 milliseconds.
22.5. STATIC TEST CONDITIONS
22.5.1. For compliance with clause 22.3.3 a test device must be selected having back pan dimensions and ‘Torso Line’ of the 3-dimensional manikin specified in the SAE documents “Manikins for Use in Defining and Measuring Vehicle Seating Accommodation”, November 1962 or J826 APR90- “Devices for Use in Defining and Measuring Vehicle Seating Accommodation” (provided that the back pan dimensions are as specified in J826 - November 1962).
22.5.2. To establish the displaced ‘Torso Line’, a test device must be placed in the seating position under test and a ‘Rearward’ moment of 370 Nm about the ‘Seating Reference Point’ must be applied through the back pan.
22.5.3. After removing the back pan, using a 165 mm diameter spherical head form or a cylindrical head form having a 165 mm diameter in plan view and a 150 mm height in profile view, apply perpendicular to the displaced extended ‘Torso Line’, a ‘Rearward’ load, at a point 635 mm along the ‘Torso Line’ from the ‘Seating Reference Point’ that will produce a 370 Nm moment about the ‘Seating Reference Point’.
22.5.4. The load must be gradually increased to 890 N or until the ‘Seat’ back fails, whichever occurs first.
22.6. ALTERNATIVE STANDARDS
22.6.1. The technical requirements of ECE R 25/01, 25/02, 25/03 or 25/04 - “Head restraints (Headrests)” and FMVSS 202-33 F.R. 15065, October 9, 1968 “Head restraints - Passenger Cars” are deemed to be equivalent to the technical requirements of this rule provided that the requirements of clauses 22.2.2, 22.2.3 and 22.2.4 are complied with.
22.6.2. The technical requirements of ECE R 17/03, 17/04 or 17/05 “Seats, their Anchorages and any Head Restraints” are deemed to be equivalent to the technical requirements of this rule provided that the requirements of clauses 22.2.2, 22.2.3 and 22.2.4 are complied with. For vehicles which have an ECE approval to R17, the approval must be for vehicles with ‘seats’ fitted with, or capable of being fitted with a ‘head restraint’
notes
This compilation of Vehicle Standard (Australian Design Rule 22/00 - Head Restraints) 2006 includes all the instruments set out in the Table of Instruments. The Table of Amendments provides a history of clauses that have been amended, inserted or deleted.
Table of Instruments
| Name of Instrument | Registration Date | Commencement Date |
| Vehicle Standard (Australian Design Rule 22/00 - Head Restraints) 2006 | 11/05/2006 | 12/05/2006 |
| Vehicle Standard (Australian Design Rule 22/00 - Head Restraints) 2006 Amendment 1 | 11/05/2006 | 12/05/2006 |
Table of Amendments
| Clause affected | How affected | Amending instrument |
| C2. (former) | C2 à C3 | Vehicle Standard (Australian Design Rule 22/00 - Head Restraints) 2006 Amendment 1 |
| C2. | ad | Vehicle Standard (Australian Design Rule 22/00 - Head Restraints) 2006 Amendment 1 |
ad = added or inserted
am = amended
del = deleted or removed
rr = removed and replaced
à = clause renumbered. This takes the format of old no. à new no.