from the website about the program
Waves of Honor Proudly Supporting America's Bravest
For your service and sacrifice, we thank you. We are proud to salute the men and women of our armed forces and their families. Waves of Honor permits any U.S. active duty military, activated or drilling reservist, or National Guardsman to one complimentary admission per year to either SeaWorld®, Busch Gardens® or Sesame Place® for military personnel and as many as three direct dependents. Service members and their direct dependents must have a valid active military ID in order to participate. Inactive, standby and retired reserve members, military retirees, U.S. Merchant Marine and civilian Department of Defense workers are ineligible for the program. SeaWorld Parks & Entertainment reserves the right to terminate the program.
... a direct dependent like a child or a spouse would have an ID . . . in some cases a parent can be a direct dep' and they TOO would qualify for an ID showing they are entitled to access the base commissary, get medical care etc ...