Mandatory upgrades for pre ADR vehicles that
require certification under this Section of VSB 14
now include split or dual braking systems and
collapsible steering columns.

Substitution or replacement of components such as camshafts, carburettors, engine management
systems, exhaust systems, etc. must not be carried out unless it can be demonstrated that the
vehicle will continue to meet the appropriate gaseous and noise emission standards (refer to
Codes LT3 and LT4 in Section LT Test Procedures).

3.1.2 Alternative Replacement Engines for Pre-1986 Passenger Vehicles
Because of the difficulty in identifying the year of manufacture of some replacement engines or the
unavailability of replacement emission control equipment for ADR 27 engines, it is recommended
that a replacement engine designed for use with unleaded fuel and complying with ADR 37 be
used where possible. Where this is impractical the following alternative is acceptable for
replacement engines for pre-1986 passenger vehicles:
 Convert the replacement engine to run on unleaded fuel (now a necessity);
 Fit new catalytic converter(s) where appropriate;
 Fit unleaded fuel filler with flap (optional);
 Operate the vehicle on unleaded fuel; and
 Ensure the engine is well maintained – alternatively overhaul and retune the engine.

1.1 BASIC MODIFICATIONS NOT REQUIRING CERTIFICATION
Fitting a manufacturer’s optional seating configuration to the particular make/model.
1.2 MODIFICATIONS REQUIRING CERTIFICATION UNDER LK CODES
The following modifications require certification under the LK Codes:
 Fitting complying seating to complying seat anchorages;
 Fitting complying seatbelts to complying seatbelt anchorages;
 Fitting complying child restraint anchorages;
 Reduction in Seating Capacity; and
 Fitting roll-bars, roll-cages and other types of ROPS.
2 GENERAL REQUIREMENTS
This sub-section applies to all light vehicles and must be read and applied in conjunction with all
the LK Codes applicable to the proposed modifications.

Modified vehicles must continue to comply with the Australian Design Rules (ADRs) to which
they were originally constructed, except as allowed for in the Australian Vehicle StandardsRules (AVSR). These modified vehicles must also comply with the applicable in-service
requirements of the AVSR.

Modified pre-ADR vehicles must continue to comply with the AVSR.
Compliance with the AVSR also means compliance with the equivalent regulations of a State or
Territory of Australia.

Seats and seatbelts play a critical role in occupant protection and personal comfort. The seat
and seatbelt can be subjected to substantial forces in a crash. It is important therefore that
each device is carefully designed, constructed and installed to ensure that adequate occupant
protection is provided.