A service member has a current active duty, including active reserve, or retired ID card from the Air Force, Army, Coast Guard, Marine Corp, or Navy. This includes disabled veterans whose ID Card indicates DAVPRM.
A dependent is the spouse or other relative of a service member who has an ID card (DD Form 1173) which shows the service member as the sponsor.
A guest is any person not a dependent accompanying the service member.
Not eligible on their own are persons who would normally have access to military bases and/or Shades of Green (SoG) such as DoD Civilians, NAF, USPHS and veterans who are not retirees. This list may include others. People who fall into this category may, however, be dependents or guests.