Which action is NOT within the powers of the DRBs?

The correct answer is that granting a medical discharge is not within the powers of the Discharge Review Boards (DRBs). DRBs are typically empowered to review cases where veterans seek changes to their discharge status or related documents. Their primary functions include examining re-enlistment codes, dates of discharge, and reasons for discharge to ensure fairness and just application of discharge policies.

A medical discharge, however, is determined by medical professionals based on the health status of the service member during their time of service. This process is primarily handled through military medical boards rather than DRBs. Therefore, they do not have the authority to grant a medical discharge since this requires specialized medical assessment and diagnosis, which falls outside the scope of a DRB's function.

In contrast, the other options involve modifications to discharge documentation or administrative actions that fit well within the DRB's role to ensure that discharge processes are just and equitable.