Accreditation and Auditing

Heavy Vehicle Accreditation in WA is mandatory for anyone who performs a transport task in connection with a business and meets one or more of the following criteria:

• Operates any combinations over 50 tonnes gross mass.
• Requires more than four Class 1 single trip permits (oversize or overmass) per calendar year.
• Operates under concessional loading scheme.
• Requires a period Permit and/or Order (Unless otherwise specified on the Permit or Order).
• Operates a RAV exceeding a width of 2.5 metres.
• Operates a RAV exceeding a height of 4.3 metres.
• Operates a RAV exceeding a length of 20 metres.
• Exceeds any of the following mass limits:

Axle Group	Mass Limit
Single Steer Axle with tyres ≥295 mm	6.5 t
Single Steer Axle with tyres ≥315 mm	7.0 t
Single Steer Axle with tyres ≥375 mm	7.1 t
Twin Steer Axle Group with load sharing suspension and tyres ≥275 mm	11.5 t
Twin Steer Axle Group with load sharing suspension and tyres ≥375 mm	12 t
Tandem Axle Groups fitted with dual tyres	17 t
Tri Axle Groups fitted with single tyres ≥375 mm or dual types, except a pig trailer	21.5 t

The following vehicle types currently do not require accreditation, unless otherwise specified on the permit or order:

• Buses;
• Special Purpose Vehicles (SPV);
• Agricultural Equipment;
• Vehicles that have a gross mass (GVM) of eight tonne or less;
• Recreational Boat Trailers.