Some see this task as complex due to non-disclosure and are experiencing a lack of expertise.

Fitness for work relates to a worker's ability to do their job safely and competently.

However, workers may attend work suffering from the effects of fatigue, stress, alcohol and/or other drug use, medical conditions and mental health issues.

These factors can lead to impaired performance and behavioural issues, with a higher likelihood of incidents and accidents.

Under the workplace health and safety laws the Person Conducting a Business or an Undertaking (PCBU) is to maintain safety in the workplace, as far as is practicable, and not expose workers to hazards.

The workers are not to harm themselves or others.

Workplaces may address fitness for work issues through systematic risk-management process that may include a range of initiatives.

These include, providing an outline of what is considered an acceptable physical, mental and emotional condition for workers to present for work as well as having systems to identify if workers are affected by alcohol or other drugs.

They may implement policies and procedures to manage workers that are potentially affected by alcohol or other drugs, and ensure that anyone adversely affected by fatigue, stress, medical conditions, mental health, alcohol or other drugs are provided with appropriate support.

However, workers too have a responsibility and a duty under the law to ensure their own fitness for work and importantly tell their PCBU if any potential impairment to their fitness for work could create a risk to safety.