Which member of the military can NOT request a sample retest?

In the context of military substance abuse programs, the ability to request a sample retest is generally limited to certain positions with specific responsibilities. The role of a Commander, Medical Review Officer (MRO), and Trial Attorney each involves authority and oversight in the context of disciplinary actions and legal proceedings related to drug testing. These individuals possess the necessary authority and access to the relevant administrative processes.

In contrast, an enlisted member such as a Private First Class, regardless of their individual circumstances or performance, does not hold a position that allows them to request a sample retest. Their role is not designed to engage with the administrative or legal framework of testing procedures, which is why they do not have that capability. This distinction emphasizes the structured hierarchy and roles within the military that dictate who can take action regarding drug testing results.