The short answer
Improvement requires corrective action; prohibition stops a serious risk activity. The appropriate tool depends on the circumstances.
An improvement notice and a prohibition notice serve different purposes. The choice depends on the contravention, the safety risk and what action can address it.
Belinda Hughes, a former NHVR Director of Prosecutions and now principal lawyer at Hughes Law, told WWTG that available enforcement options deserved consideration before an operation was grounded, where circumstances allowed.
She identified improvement notices as one possible option. Her argument concerns the suitability and scope of the intervention; it does not mean that every serious risk can be managed while the activity continues.
Correcting a problem
Section 572 of the Heavy Vehicle National Law as applied in Queensland provides for improvement notices where an officer reasonably believes a contravention has occurred or is occurring and is likely to continue or recur.
The notice can require corrective action within a stated period. Prohibition under section 576A instead addresses an immediate or imminent serious health or safety risk.
Those are different statutory tests. The existence of a corrective option does not establish that it would be sufficient in a particular prohibition case.
What NHVR says it considers
In its written response to WWTG on 23 September, the NHVR said it considered the circumstances and appropriate regulatory response. Available responses included education, engagement, improvement notices and requirements for vehicles to be presented for inspection.
The regulator said stronger intervention could be necessary when serious safety issues remained unaddressed and evidence indicated an immediate or imminent risk of death or serious harm.
It described prohibition notices as remedial, rather than punishment. Its response was general and did not explain the choice of intervention in any specific case.
Explaining the decision
Hughes linked the consideration of alternatives to section 578, which requires officers exercising powers to use reasonable diligence to minimise inconvenience and damage.
The NHVR said its officers exercised their powers in accordance with that obligation. The duty does not guarantee that an operator will avoid disruption.
For an individual matter, the comparison needs evidence: what must be corrected, whether the risk activity can be isolated and why the chosen response is necessary. A business’s hardship is part of its experience, but it does not settle the safety question.
Explaining the available tools helps operators understand both the intervention and the corrective work expected of them. The central test remains whether the response can achieve the necessary safety outcome in the circumstances.