How many months will a member who tested positive for drug or alcohol be subjected to follow-up testing after returning to duty?

The duration for which a member tested positive for drug or alcohol is subjected to follow-up testing after returning to duty is one of the critical aspects of maintaining safety and compliance within fire services. In this particular case, the correct answer of 36 months aligns with standard practices that aim to ensure the accountability and integrity of personnel.

The three-year follow-up testing period is designed to monitor the individual's behavior closely and ensure that they remain free from substance use issues. This extended period reflects the seriousness with which substance use is taken in safety-sensitive positions such as that of a fire lieutenant. It allows time for proper rehabilitation and ensures that comprehensive checks are made to reaffirm the member's fitness for duty.

In terms of the other options, while 12 months, 24 months, and 48 months may seem viable durations for follow-up assessments, they do not align with the enforcement protocols established in many organizations concerning substance abuse post-rehabilitation. The shorter durations could potentially not provide the necessary oversight, while a 48-month period may be seen as excessive given the standard practices in place. Thus, 36 months strikes a balance between thoroughness and realism in monitoring an employee's return to full operational capacity.