Final answer:
A service member or their representative has three years from the date a military decoration was disapproved or downgraded to request reconsideration. This appeal process requires new evidence and is directed by service-specific military regulations.
Step-by-step explanation:
To address the question related to military awards and decorations, for disapproved or downgraded recommendations, a service member or their representative is permitted to initiate a request for reconsideration within three years of the date the decoration was disapproved or downgraded, according to the policies of the respective branch of the United States Armed Forces.
This process is often governed by service-specific regulations, which provide guidelines for submitting an appeal or reconsideration request. For a successful appeal, new, substantive evidence or information not previously considered must be presented. These regulations ensure that service members are recognized appropriately for their acts of valor, achievements, or meritorious service.