Under what circumstance is a commander authorized to test a soldier's Blood Alcohol level?

The correct answer is that a commander is authorized to test a soldier's Blood Alcohol level when the soldier is aware of it. This aligns with protocols that prioritize the awareness and consent of personnel during testing procedures. Conducting a test while the soldier is aware ensures transparency and maintains the integrity of the testing process.

Testing under such circumstances typically follows policies that help assure the rights of the soldier while promoting a healthy and safe environment within the unit. Awareness during the testing process helps uphold the standards of fairness and encourages compliance with orders.

Organizations generally require that testing is performed with the soldier's knowledge to mitigate disputes about the testing process itself. This approach also aligns with principles of accountability and responsibility in military conduct, positioning the commander to maintain order and discipline among service members.