Managing drug and alcohol risks in the workplace

Drug and alcohol risk is first a work health and safety question. Where a substance may affect a person's ability to work safely it is a hazard to be managed like any other, and that includes prescribed and over-the-counter medicines as well as alcohol and illicit drugs. Safe Work Australia's guidance on drugs and alcohol at work is a starting point.

Australia has no uniform safety statute. Victoria regulates through the Occupational Health and Safety Act 2004 (Vic); the other States, the Territories and the Commonwealth have each enacted work health and safety laws based on the model law, with local variations. Identify the enacted law applying to each site, and check the position with the relevant regulator through Safe Work Australia's list of regulators.

Road, rail, maritime, aviation, mining and other regulated safety-critical work may also carry statutory, licensing, operator or instrument obligations, including mandated testing, which a general policy does not displace. This guide is general information, not legal advice; AWS is a workplace consultancy, not a law firm.

Proportionality depends on an honest assessment of the work. Safety-critical work should be identified by actual tasks, hazards and the consequences of an error — plant operation, driving, work at height, live electrical work, patient care, remote or solo work — not by title. Two people with the same title can sit on different sides of that line.

The program must be proportionate to the risk, applied consistently within the cohort, and reviewed as roles, technology and contracting change. A cohort list set once and never revisited stops describing the organisation.

“Zero tolerance” is a slogan, not an analysis. It conceals three rules that should be stated separately: work while impaired; detectable substances at or above a stated cut-off; and consequences of breach. They raise different questions of evidence and fairness, and merging them is a common source of disputed decisions.

There is no general, universal employer entitlement to conduct any form of testing in any workplace. Whether testing can be required, and whether a direction is reasonable, may depend on the applicable statute, an award or enterprise agreement, the contract, an established policy, the consultation history, the scope of the employment and the circumstances of the direction.

A policy does not settle lawfulness and cannot confer an authority the governing framework withholds, and a safety rationale does not make every method, cohort or consequence reasonable. The better question is not “can we test” but “what is the source of authority for this test, of this kind, for these people, with this consequence attached”.

Consultation obligations may arise under the applicable WHS or OHS statute where a change affects health and safety, and separately under an award or agreement clause. Those are distinct duties with distinct triggers, and neither is the same as good-practice engagement. Map the trigger before assuming an obligation.

Pre-employment, random, for-cause and post-incident testing are not interchangeable. Each needs its own justification, scope and design.

• Pre-employment: what is screened, how it relates to the inherent requirements of the role, how discrimination and privacy risks are managed, and what a result is used for.
• Random: whether the safety case supports testing people about whom there is no individual concern, how selection is genuinely random and auditable, and what frequency is proportionate.
• For-cause: what objective threshold triggers a test, who may authorise it, how observations are recorded, and how the direction is explained at the time.
• Post-incident: which incidents and near misses are in scope, the time window, whether testing follows automatically or on assessment, and how presence is read given it does not establish causation.

Screening and confirmation do different work, and the confirmation step is not the same for every substance. An initial non-negative drug screen is provisional, and should be handled under the confirmatory process the applicable method requires — commonly analysis by an appropriately accredited laboratory under the relevant standard or protocol. Alcohol testing follows a different path: it must be conducted on a calibrated device and confirmed through the repeat, evidential or confirmation procedure required by the applicable law, instrument, standard, policy and validated method, which is not necessarily laboratory-based. Treating any initial screen as final invites challenge.

Quality controls should be specified in the provider contract and audited: competent collectors and operators; calibrated, fit-for-purpose devices; documented chain of custody where samples are collected; sample integrity controls; stated cut-offs; identity verification; secure records; and appropriately accredited laboratory analysis where the applicable method requires it. The applicable technical standards should be applied in their published form.

Interpretation matters as much as method. Breath or blood alcohol concentration speaks to a level at a point in time; urine and oral-fluid results speak to presence within a detection window that differs by substance, method and individual. A confirmed result does not automatically prove present impairment or that a substance caused an incident, and is not itself a finding of misconduct. It is one piece of evidence, read with the policy, method, timing, work and observations.

The Fair Work Commission Full Bench decision in Endeavour Energy is useful for what it decided about testing method, the risk addressed and the reasonableness of a program in its industrial context. It is not a universal rule about which method an employer must adopt.

The table shows how the response, the basis for testing or inquiry, the pathway and the record trail differ across recurring situations.

The immediate priority is a neutral safety response, not a finding. Stop or reallocate the unsafe work, separate the person from safety-sensitive duties, arrange safe transport where needed, preserve evidence, and activate the defined escalation path rather than improvising.

Do not diagnose intoxication from demeanour. Record what was observed, when, on what task and before whom, and hold open the alternatives: illness, fatigue, psychological distress, injury or lawful medication. Any direction, search, medical inquiry, test or removal from duties needs a lawful, reasonable and proportionate basis. Language should be factual; a conclusion recorded before assessment follows the matter into every later step.

Worked example A — forklift operator, objective signs before shift. At a pre-start check a supervisor observes unsteady gait, slurred speech and an unusual smell. She directs the operator not to commence work, reallocates the task and moves to a private area. She records the observations, time and witnesses on the standard form without asserting intoxication. The for-cause provisions of the agreement and policy are explained, an oral-fluid drug screen returns an initial non-negative result, and the sample goes for accredited laboratory confirmation under chain of custody. That provisional screen is not a conduct finding, and is separate from the observed smell. The operator is placed on paid removal from safety-sensitive duties and a taxi is arranged. Only after confirmation, his explanation and a collection-quality review does the employer consider any conduct or fitness process.

Terminology should be precise in the policy and in correspondence. An initial non-negative screen is not a confirmed positive. An invalid or dilute sample raises a collection and integrity question first, and only sometimes a conduct question.

Before any decision, work through the confirmation result, any collection or laboratory issue, the employee’s explanation, medication, the policy and instrument wording, and other evidence about the work performed. A decision on the screen alone is the weakest version of the employer’s position.

A refusal or failure to cooperate is not automatically misconduct. Investigate the reason — medical, a shy-bladder issue, confusion about the direction, a support-person request — and ask whether the direction was lawful and reasonable, clearly communicated, understood and supported by the governing framework. Equally, refusal is not immune from consequence: where the direction was properly founded and explained and the refusal deliberate, it may support disciplinary action after a fair process.

Lawfully taking prescribed or over-the-counter medication is not misconduct, even where it may affect safety. The employer’s legitimate interest is fitness for the particular work: what restrictions apply, for how long, and what controls manage the residual risk.

Inquiries should be narrow and directed to capacity, not diagnosis or medical history. Disability discrimination, general protections, privacy, inherent requirements and reasonable adjustment obligations all engage here, and outcomes are fact-specific; the Australian Human Rights Commission publishes guidance on disability rights at work. No employer should assume a particular outcome from a fitness process. A workable policy asks workers to disclose, through a confidential channel to a nominated person, medication that may genuinely affect safe performance, rather than everything in the medicine cabinet.

Worked example B — field-services analyst, disclosed medication and a non-negative screen. A field-services analyst whose duties include regular driving to client sites tells the nominated contact that a newly prescribed medication is causing drowsiness. She later undergoes an oral-fluid drug screen under the organisation's established, consulted program for that defined driving cohort, supported by the governing framework, and it returns an initial non-negative result for the relevant class. There are no observations of impaired performance, and the employer does not treat the result as proof of impairment or misconduct. It seeks accredited laboratory confirmation, asks the treating practitioner only about functional restrictions on the actual duties and their duration, and agrees adjustments: no driving on work business, with suitable alternative duties, for two weeks. The medical information is stored separately with restricted access and the arrangement is reviewed.

Test results and medication disclosures are sensitive health information. Do not assume the Privacy Act 1988 (Cth) covers every act in a workplace program, or that the employee-records exemption removes all obligations. The exemption is limited: it applies to acts or practices of an employer directly related to a current or former employment relationship and to an employee record as defined. The OAIC explains the boundaries of the employee records exemption.

It does not automatically extend to job applicants, contractors and labour-hire workers, or to handling by collectors, laboratories, employee assistance providers and other suppliers, who have their own obligations. State and Territory privacy, health-records and surveillance laws may also apply.

Practically: notice about what is collected and why; collection limited to that purpose; need-to-know access; secure storage separate from personnel files; defined retention and destruction; a correction route; and privacy obligations on every vendor.

Employee assistance programs sit outside the disciplinary process. The employer may properly know whether a referral was made, and whether an agreed arrangement is being met where the employee has authorised that, but not clinical detail.

Stopping unsafe work is not the same as an unpaid stand-down. Section 524 of the Fair Work Act 2009 (Cth) permits stand-down without pay only in narrow circumstances where an employee cannot usefully be employed; it is not a general power to withhold pay because impairment is suspected. The Fair Work Ombudsman summarises the limits at stand downs.

Check pay status and the source of authority against the Fair Work Act, the applicable award or agreement, the contract and the policy before anything is communicated. Depending on the facts, paid removal, alternative safe work or an agreed leave arrangement may be appropriate.

Interim action should be neutral, proportionate, explained, time-limited and reviewed as information arrives. Measures that quietly become indefinite read as a penalty imposed before any finding.

A confirmed positive result, a refusal, a policy breach or an incident does not automatically establish serious misconduct or justify dismissal. Keep the safety decision separate from any later conduct, capacity or fitness decision.

Before disciplinary action, test the foundations: was the rule valid and clearly communicated; was the method sound; what explanation has been considered; what is the actual role and risk; how have comparable matters been treated; and has the person had a fair opportunity to respond. The Fair Work Commission's material on a valid reason relating to capacity or conduct sets out the terrain a later challenge would cover.

Harbour City Ferries v Toms is often cited for the proposition that breach of a drug and alcohol policy in a high-risk operation can justify dismissal. It is fact-specific to a particular role, policy and circumstances, not a rule that a positive result ends employment.

Assistance, treatment, employee assistance referral, leave or a return-to-work plan is often the more durable response where dependence is disclosed. Support does not displace the obligation to control immediate safety risk; the two run together.

AWS assists employers with risk assessment, policy design, manager training, incident response and program review. See psychosocial safety and WHS and workplace advisory.