What is the Primary Duty under the HVNL?
Short answer
Primary duty requires each party in the Chain of Responsibility to ensure, so far as is reasonably practicable, the safety of its transport activities and to avoid causing or encouraging another person to breach the HVNL.
Plain English
If your business sends, receives, packs, loads, schedules or carries heavy-vehicle freight, it must identify and control the public risks created by the transport work it controls or influences. The duty cannot be contracted out.
What this means operationally
Map transport activities, identify hazards, document controls, consult with other Chain of Responsibility parties and monitor whether controls work. Never use prices, schedules, loading practices or contract terms that create incentives to speed, drive while fatigued or unfit, breach work and rest requirements, or break another law to meet a deadline.
Who it applies to
Each party in the Chain of Responsibility for a heavy vehicle, including operators, employers, prime contractors, schedulers, consignors, consignees, packers, loaders, loading managers and unloaders, to the extent of the activities the party can influence or control.
Example
A consignor that sets an impossible delivery window must change the window or the transport plan rather than leave the driver to speed or breach work and rest requirements.
Exceptions and traps
The HVNL generally regulates a vehicle with a GVM or ATM above 4.5 tonnes, and a combination that includes such a vehicle. A vehicle at 4.5 tonnes or less is not a heavy vehicle merely because it carries freight. Western Australia and the Northern Territory have not adopted the HVNL for domestic operation, although their vehicles must comply when operating in a participating jurisdiction.
What changed
The primary duty has applied since the 2018 Chain of Responsibility reforms. The current HVNL reprint includes the broader reforms that commenced on 1 August 2026, but it did not create a new primary duty.
Previous rule
Before 1 October 2018, Chain of Responsibility obligations were framed more narrowly around specific offences rather than the current risk-based primary duty.
Legal foundation
Heavy Vehicle National Law ss 6, 26A-26C and 26E
Sources & primary documents
- www.legislation.qld.gov.au/view/whole/html/inforce/current/act-2012-hvnlq
- www.nhvr.gov.au/safety-accreditation-compliance/chain-of-responsibility
WWTG verification: Queensland legislation, NHVR
Frequently asked questions
What is primary duty?
It is the duty of each Chain of Responsibility party to ensure, so far as is reasonably practicable, the safety of its transport activities.
Can I contract the duty out?
No. Contracts can allocate tasks, but they cannot remove a party’s statutory duty for matters it can influence or control.
Does it apply only to the trucking operator?
No. It can apply to every Chain of Responsibility party, including customers and businesses that schedule, consign, pack, load, receive or unload freight.
Does a 4.5 tonne vehicle fall under the HVNL?
A vehicle with a GVM or ATM of 4.5 tonnes or less is not a heavy vehicle under the HVNL; a combination is covered if it includes a vehicle above 4.5 tonnes.
What should a business document?
Its transport activities, hazards, risk controls, consultation, monitoring, incidents and corrective actions.