In 1974, a when I was in the Marine Corps at Camp Lejeune, NC, I drove a friend of mine up to Scranton to see his girlfriend one weekend. While they were doing whatever, I went to a local bar to while away some time. When I asked for a beer, the bar tender asked for my “ABC Card”. I told him in my deep Southern accent that I was from Florida and in the USMC and didn’t know what in heck he was talking about. They served me anyway..............
I had no idea! I can’t even find anything about that policy on Google.