It would seem that AAA is changing the way they deal with those AAA parking passes. The vast majority of offices give them out as a perk of buying a travel package with AAA. Some may give them to you as part of a ticket purchase.
It used to be, until just recently, that you were sort of able to pass your parking pass on to someone else....even though AAA said that the passes were not transferrable or for sale. People were actually selling their used AAA parking passes on Ebay!! Now, AAA has made the parking pass part of the booklet they give you...it has your name and reservation dates on the parking pass. You have to show it to the parking attendent, who will most likely ask to see other ID in order to confirm that you are the person listed on the parking pass.
There was a ton of abuse, so it would seem that AAA is closing up that loophole.