Document ID: chunk:federal_register_of_legislation:F2006C00263:body:0:p2
Version: federal_register_of_legislation:F2006C00263
Segment Type: other
Provision Reference: 
Character Range: 4219–8403

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