What is one circumstance under which a Request Mast may be denied?

A Request Mast may be denied in circumstances where individuals have legal proceedings pending under the Uniform Code of Military Justice (UCMJ). This circumstance is significant because the legal process must be preserved and followed without interference. Allowing a Request Mast while an individual is involved in legal proceedings could compromise the integrity of those proceedings or result in confusion regarding the legal process. The military prioritizes the rule of law and due process, and as such, it limits access to Request Mast when it could potentially conflict with ongoing judicial actions.

In contrast, other options involve situations that might not have the same critical legal implications. For instance, being evaluated for a promotion or seeking a change in duty assignments does not inherently impede the ability to request mast, as these issues can often be addressed without affecting legal processes. Similarly, while a separate grievance process might be underway, it does not necessarily relate to a legal proceeding and could still allow for a Request Mast under certain conditions, depending on the specifics of the situation.