Queensland · Last checked 6 August 2026
Queensland critical-control requirements after 1 June 2026.
From 1 June 2026, critical control management became a mandatory and enforceable requirement for all mineral mines and quarries in Queensland. The practical challenge is not only identifying controls—it is making them observable, verifiable and actionable in the field.
What changed
Critical controls now have an explicit operating chain.
Resources Safety and Health Queensland states that the legislative changes are intended to make the hazard and risk controls that matter most clearly identified, effectively implemented and routinely verified as working as intended.
The guidance is directed at mineral mines and quarries. Coal mines operate under a related but distinct legislative and guidance context, so organisations should use the material that applies to their operation rather than treating all Queensland mining requirements as interchangeable.
For mineral mines and quarries, the regulator’s step-by-step guidance begins with the threshold for a Material Unwanted Event and follows the control through risk assessment, performance, verification, response and governance.
Steps 1–4
Define the event, assess the risk and identify the critical few.
The mine operator defines and documents the threshold for unwanted events that warrant the highest level of attention. The Site Senior Executive then identifies site-specific events that could reasonably reach that threshold, informed by hazards, incidents and foreseeable low-probability events.
A risk assessment for each identified event describes the hazard and unwanted event, credible causes and consequences, and the controls that prevent the event or mitigate its consequences.
The next discipline is selection. A critical control is crucial to preventing the event or mitigating its consequence, and its failure or absence would significantly increase risk. The guidance is explicit about focusing on the critical few rather than the important many.
- Can the organisation explain why an event meets its MUE threshold?
- Does the assessment reflect the site rather than a copied corporate list?
- Can each selected control be traced to the cause or consequence it addresses?
- Would failure of the control materially change the risk?
Steps 5–8
Define performance, verify it and act on failure.
Each critical control needs a clear purpose and performance requirements that are specific, observable and measurable. People should be able to distinguish acceptable from unacceptable performance without relying on vague judgement after the fact.
The method, frequency and responsibility for verification must then be defined. Verification is meant to confirm that the control is performing as intended in the field—not simply that a form has been completed.
Critical controls are documented in the safety and health management system. The regulator’s guidance describes a central register containing the MUE, control, performance and verification requirements, responsible roles and current status. When monitoring or verification identifies a defective control, prompt action is required and work may need to be modified or stopped until the control is restored.
One line deserves particular attention: the absence of incidents is not evidence that controls are effective. Positive evidence of performance is the point of the system.
Steps 9–11
Close the loop through reporting, resources and worker understanding.
The Site Senior Executive should routinely report critical-control performance to the mine operator, including verification outcomes and actions taken to address deficiencies. That reporting gives the operator a basis for oversight rather than a summary of lag indicators.
The mine operator must also make adequate resources available. Competent people, safe plant and equipment, support and time are part of whether the system can operate as designed.
Workers must be informed about the relevant MUEs and critical controls, understand why the controls matter, and know what to do when a control is not working. They should be able to demonstrate the required response to warnings, alarms and ineffective controls.
Implementation view
What a useful critical-control system should make easier.
A practical implementation connects the register to roles, work, verification and response. It should be easy to see which verification is due, what evidence supports the conclusion, where a control is degraded and who is responsible for the next decision.
Technology may help with offline field activity, timestamps, structured observations, photos, escalation and assurance coverage. Training and supervisor practice are equally important: a technically complete system still fails if workers cannot recognise the control or act when it is ineffective.
The design test is simple to state and demanding to meet: can the organisation show what was required, what happened in the field, what was concluded and what followed?
- Use the organisation’s risk and SHMS structure rather than creating a disconnected control universe.
- Keep performance requirements observable and testable at the point of verification.
- Design escalation around operational authority, not only automated notifications.
- Report coverage and exceptions without burying repeated failure patterns.
- Review the workflow when conditions, guidance or control design change.
Primary material
Sources checked
- Resources Safety and Health Queensland — identifying and managing critical controls
- Queensland legislation — Mining and Quarrying Safety and Health Act 1999
This article provides general operational information, not legal advice. Confirm the legislation, regulator guidance and site-specific requirements that apply to your operation.
A useful first step
Start with the problem as it exists today.
Tell us where the work gets difficult, what is at stake and what the current system asks people to do.