What triggers a return-to-duty test?

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A return-to-duty test is specifically required when an employee has violated a drug and alcohol policy, particularly after having tested positive for a substance. After the individual completes a rehabilitation program, which is designed to address issues related to substance use and ensure the individual's readiness to return to the workplace, they must undergo a return-to-duty test. This test serves as a means of verification that the employee no longer poses a risk to health and safety and is fit to perform their job duties, following the successful rehabilitation.

The other options relate to different circumstances in substance testing. Random testing is a proactive measure aimed at prevention, rather than a follow-up to a violation. A formal complaint about substance use does not directly necessitate a return-to-duty test but may initiate an investigation. Completion of annual safety training is unrelated to substance use issues and does not trigger any specific testing requirements.