Which duty is NOT a potential punishment from a court martial?

The correct answer is the option referring to the Intelligence Officer position. This is because a court martial typically imposes punishments that are directly related to the service member's rank, pay, and restrictions on movements within their assigned duties.

In contrast, being assigned to an Intelligence Officer position does not fall under standard punitive measures; rather, it represents a specific role or set of responsibilities within the military. It is not a form of punishment but rather a designation that involves trust and a set of expectations regarding a service member’s capability to handle sensitive information and perform intelligence operations.

Other options such as rank reduction, restriction to post, and suspension of pay represent administrative and disciplinary actions that can be imposed as part of a trial process for various offenses. These measures directly affect a service member's status and conditions of service, which is not the case for an assignment like that of an Intelligence Officer.