An Australian workplace drug and alcohol policy must define the scope and purpose, establish the lawful authority to test (via contract or enterprise agreement), specify which testing types apply and when, reference AS 4308:2023 for urine testing and AS 4760:2019 for oral fluid testing, include a prescription medication notification pathway, and set out a consistent disciplinary framework. A policy that omits any of these elements will face challenge the first time it is enforced.
Why most workplace drug and alcohol policies fail when tested
The Fair Work Commission sees drug and alcohol dismissal cases every month. The pattern is consistent: an employer with a policy, a positive test, a dismissal — and then an unfair dismissal finding because the policy had a structural gap the employer never noticed until it mattered.
The three most common gaps are: (1) the policy references testing but the employment contract does not — so the worker argues there was no lawful authority to require the test; (2) a non-negative screening result was treated as a confirmed positive without completing the confirmation testing and medical review officer process required under AS 4308:2023; and (3) a prescription medication positive was treated as misconduct rather than being referred through a fitness-for-duty process first.
None of these gaps require sophisticated legal knowledge to close. They require policy writers who understand how the Australian Standards and the Fair Work Act 2009 interact — and who have tested the policy’s logic against a realistic contested positive result before it goes live.
The legislative and standards framework that governs testing
No single statute creates a blanket right to drug and alcohol test in Australian workplaces. The framework is a combination of general duties legislation, sector-specific regulation, industrial instruments, and technical standards.
Work Health and Safety Act 2011 (Cth/State equivalents)
Creates the general duty to manage impairment risk. Does not specify testing. Provides the policy's WHS rationale but not its authority to test.
Fair Work Act 2009
Governs dismissal, adverse action, and the lawfulness of employer directions. A testing direction must be lawful and reasonable. Testing without industrial authority is an unlawful direction.
Disability Discrimination Act 1992
Requires consideration of reasonable adjustment before any adverse employment action arising from a positive result that relates to a disability — including substance dependence. Cannot be excluded by policy.
AS 4308:2023
Specifies collection, chain-of-custody, laboratory analysis, and MRO review processes for urine-based drug testing. Compliance is required for results to be legally defensible.
AS 4760:2019
The equivalent standard for oral fluid (saliva) testing. Specifies cut-off concentrations, device validation requirements, and confirmation testing via LC-MS/MS. Point-of-care devices must meet validation criteria.
Sector-specific regulations (mining, rail, aviation, maritime)
Impose mandatory fitness-for-duty and testing requirements independent of the general WHS duty. Coal mining in Queensland and NSW, for example, operates under specific regulations with defined testing requirements and chain-of-custody obligations.
The ten elements a defensible policy must contain
A policy that survives a Fair Work challenge is not longer than one that does not — it is more precise. These are the ten elements that determine whether a policy holds up under scrutiny.
Purpose and scope
State the WHS rationale explicitly. Define which workers are covered: employees, contractors, labour hire workers, and visitors where relevant. Define which sites or work contexts the policy applies to. A policy that is vague about scope cannot be consistently enforced.
The lawful authority to test
Reference the employment contract clause, enterprise agreement provision, or industry regulation that creates the authority to require testing. Without this, the policy is aspirational — not enforceable. This is the most commonly missing element.
Testing types and triggers
Specify which testing types apply: pre-employment, random, for-cause, post-incident, and return-to-work. Define each trigger precisely. "Post-incident" should define what constitutes an incident that triggers testing — a lost-time injury, a near miss with potential for serious harm, property damage above a specified threshold.
Applicable Australian Standards
Name AS 4308:2023 for urine testing and AS 4760:2019 for oral fluid testing by name. Specify that collection, chain-of-custody, and analysis must comply with the relevant Standard. Specify that non-negative screening results require confirmation testing before any finding can be made.
Cut-off levels and substances tested
List the substances included in the testing panel and the cut-off concentrations that apply. Workers have a right to know what they are being tested for and at what levels. Listing this also prevents later disputes about whether a specific substance was within scope.
Medical review officer (MRO) process
Under AS 4308:2023, confirmed positive laboratory results must be reviewed by a medical review officer before being reported as positive to the employer. The policy should describe this process and confirm that the employer receives the MRO outcome — not the raw laboratory result — to avoid premature action on a result that may have a legitimate medical explanation.
Prescription medication notification pathway
Require workers to notify the testing medical reviewer (not their manager) if they are taking a prescribed medication that may affect their test result or their ability to safely perform their role. Specify that notification goes to the health professional, not the employer, to protect medical confidentiality. Define what happens when a prescription medication notification is made: referral to a fitness-for-duty assessment, not automatic exclusion.
Alcohol limits
Specify the blood alcohol concentration (BAC) that constitutes a positive result. For most safety-critical roles, 0.00 g/100mL BAC applies. For general site access, 0.02 g/100mL or 0.05 g/100mL may apply depending on the role category. Different BAC thresholds for different role categories must be clearly defined — an inconsistently applied BAC threshold is an adverse action risk.
Worker rights during the testing process
Specify the worker's right to have a support person present, the right to request a split sample and independent confirmation testing, the right to provide a medical explanation via the MRO process, and the right to appeal a finding. These are not optional extras — they are procedural fairness requirements.
Disciplinary framework — first, second, and subsequent events
Define the disciplinary response for a confirmed positive result — separately for first, second, and subsequent events. For most enterprise workplaces, a first confirmed positive triggers a fitness-for-duty assessment and mandatory rehabilitation referral rather than immediate dismissal. The framework should also define the response to refusal to test, which is typically treated as equivalent to a positive result.
Prescription medication: the element most policies get wrong
Prescription opioids, benzodiazepines, and stimulants will return non-negative screening results. They are increasingly prevalent in the working-age population — the Australian Institute of Health and Welfare reported that opioid dispensing for chronic pain affected approximately 3 million Australians in 2022–23. In any workforce of meaningful size, prescription positives will occur.
A policy that treats a prescription opioid positive the same as an illicit drug positive is both clinically incorrect and legally vulnerable. Under the Disability Discrimination Act 1992, substance dependence may constitute a disability — and the employer’s obligation to consider reasonable adjustment applies before any adverse employment action is taken.
The correct pathway is: non-negative screening result → confirmation testing (AS 4308:2023 or AS 4760:2019) → MRO review of confirmed result including consideration of prescribed medication → MRO reports to employer as either “positive” (where the medication creates genuine impairment in the specific safety-critical role) or “negative” (where the medication does not affect safe performance) → employer makes employment decision based on MRO outcome plus fitness-for-duty assessment where indicated.
This is not a loophole. It is the correct application of the Standard and the law. A policy that short-circuits this process is both clinically wrong and likely to fail in any Fair Work or anti-discrimination proceeding.
Implementing the policy: what the rollout must include
A policy document is not a policy implementation. A poorly implemented policy provides almost no more protection than no policy at all — because the employer cannot demonstrate that workers understood what was required of them.
Contractual embedding
- ›Employment contracts reference the D&A policy by name
- ›New hire onboarding includes signed acknowledgement
- ›Enterprise agreement reflects testing authority where applicable
- ›Labour hire and contractor agreements include equivalent obligations
Worker communication
- ›Policy briefed at induction — not just distributed
- ›Workers understand cut-off levels and substances tested
- ›Prescription medication notification pathway clearly explained
- ›Worker rights during testing process communicated
Testing provider accreditation
- ›Collection agents trained and accredited to AS 4308:2023/AS 4760:2019
- ›Chain-of-custody documentation completed for every sample
- ›Confirmation testing laboratory holds NATA accreditation
- ›MRO process in place before first positive result occurs
Ongoing management
- ›Testing records stored securely, separate from personnel files
- ›Random testing schedule managed to ensure genuine randomness
- ›Rehabilitation pathway identified before it is needed
- ›Policy reviewed when Australian Standards are updated
Frequently asked questions
Is a drug and alcohol policy legally required in Australian workplaces?
There is no single statutory requirement under the model Work Health and Safety Act 2011 that mandates a written drug and alcohol policy for all workplaces. However, several regulatory frameworks create a practical obligation: workers in safety-critical industries such as mining, rail, aviation, and maritime face sector-specific regulations that require fitness for duty programs including substance testing. Separately, under the general duty provisions of the WHS Act 2011, employers must eliminate or minimise risks to health and safety so far as is reasonably practicable — and impairment from alcohol or other drugs is a reasonably foreseeable risk in most operational workplaces. A written, implemented policy is the standard mechanism for discharging that duty and for maintaining a defensible position if an incident occurs.
Can an employer test employees for drugs and alcohol without consent?
Consent and lawful authority for drug and alcohol testing in Australian workplaces derives from the employment contract, an enterprise agreement, or an industry-specific regulation — not from the WHS Act itself. A policy alone does not create the right to test if the employment contract does not reference it. Testing must be introduced via proper industrial instruments and communicated to workers before being enforced. In enterprise agreement environments, the testing regime is usually negotiated and documented in the agreement. Employers who attempt random or post-incident testing without the appropriate contractual or industrial authority face the risk of Fair Work Act 2009 adverse action claims and findings of unlawful conduct.
What Australian Standard applies to workplace urine drug testing?
AS 4308:2023 (Procedures for specimen collection and the detection and quantitation of drugs of abuse in urine) is the controlling standard for urine-based workplace drug testing in Australia. It specifies collection procedures, chain-of-custody requirements, laboratory testing methodologies, and the medical review officer (MRO) process for reviewing positive results. For oral fluid (saliva) testing, AS 4760:2019 (Procedures for specimen collection and the detection and quantitation of drugs in oral fluid) applies. Any testing program that does not conform to these standards is likely to produce results that are not defensible if challenged in the Fair Work Commission or a court.
What cut-off levels apply for workplace oral fluid drug testing under AS 4760:2019?
AS 4760:2019 specifies screening and confirmation cut-off concentrations for the six drug classes most commonly tested in Australian workplaces: THC (cannabis), methylamphetamine, MDMA, cocaine, opiates, and benzodiazepines. For THC the screening cut-off is 10 ng/mL and the confirmation cut-off is also 10 ng/mL using LC-MS/MS. Methamphetamine has a screening cut-off of 50 ng/mL and confirmation at 50 ng/mL. These cut-offs are set to minimise false positives from passive exposure while capturing genuine recent use. Point-of-care devices used on-site must be validated against these cut-offs — not all commercially available devices meet the AS 4760 analytical requirements for defensible workplace testing.
How should a workplace drug and alcohol policy handle prescription medication?
Prescription medication is the most common source of contested positive results in workplace testing programs. A well-drafted policy requires workers to proactively notify their employer (via the treating occupational physician or designated medical reviewer — not their direct manager) if they are prescribed a medication that may affect their capacity to safely perform their role. The notification obligation is to the health professional in the testing process, not a disclosure of the specific condition or drug to management. The policy should reference the employer's obligation under the Disability Discrimination Act 1992 to consider reasonable adjustment — modified duties or temporary redeployment — rather than automatic removal from safety-critical work. Policies that treat all medication-positive results as misconduct are both clinically wrong and legally risky.
Can an employer dismiss a worker who returns a positive drug and alcohol test?
A single positive test result does not automatically justify dismissal. The Fair Work Commission has consistently held that dismissal for a positive test is only valid where the employer has a clear, communicated policy; the testing was conducted lawfully and in compliance with the applicable Australian Standard; the worker was advised of their right to have the confirmation sample tested independently; and the worker was given a genuine opportunity to respond to the finding. Dismissal of a first-time positive result is often found to be disproportionate where the worker has a clean disciplinary record, the test was not post-incident, and the employer did not offer or consider an employee assistance or fitness-for-duty management pathway. The policy should specify the disciplinary framework — including what constitutes a first, second, and third event — so that outcomes are consistent and foreseeable.
Drug & Alcohol Testing — Full Service Overview
OccuSpan's AS 4308:2023 and AS 4760:2019-compliant testing program.
Fitness for Work Assessment
When a fitness-for-duty assessment is required and what it covers.
Pre-Employment Screening Guide
IROJ-based pre-employment screening including substance testing.
Occupational Health Assessment
The broader occupational health assessment framework in Australia.
OccuSpan
Drug and alcohol testing that holds up when challenged
OccuSpan’s drug and alcohol testing program is fully compliant with AS 4308:2023 and AS 4760:2019 — with NATA-accredited laboratory confirmation, MRO review built in, and chain-of-custody documentation for every collection. Results are linked directly to your policy framework and stored audit-ready.
See the testing program