Who can cancel a determination of a prior test?

• A. IA
• B. MRO
• C. HR
• D. Employee

Answer: (B)

The Medical Review Officer is the person who has the authority to review and cancel a determination of a prior test. In a formal drug-testing process, the MRO serves as an independent medical professional who checks the results, examines any legitimate medical explanations (like prescriptions or medical conditions), and ensures the test was conducted properly. If the MRO finds a valid reason that could change or invalidate the initial decision, they can cancel that determination or alter its outcome.

Internal Affairs, Human Resources, or the employee do not have the authority to reverse or cancel a test determination on their own; this authority rests with the MRO, whose role is to verify results and safeguard fairness and accuracy in the process.