What is one requirement for military personnel before an investigation can be conducted?

One requirement for military personnel before an investigation can be conducted is that they must have enough time left in service. This condition ensures that the individual will be available throughout the entirety of the investigation process and any subsequent actions that may arise as a result of the findings. If a service member is nearing the end of their tenure, it may not be feasible to continue the investigation without interruptions, which could impede the overall process and effectiveness of the security protocols in place.

Having enough time left in service guarantees that the personnel can fully engage in any required interviews, participate in hearings, or adhere to any potential recommendations made after the investigation. This aspect is critical in maintaining the integrity of the investigative process and ensuring that personnel security within the military remains robust. The other options may reflect desirable attributes but do not specifically constitute a formal requirement that directly impacts the initiation of the investigation.