Think of high school sports. There are a number of different organizations that recognize AA's. No one organization has a trademark on the term. What counts is how much prestige the recognition is. In high school football the Parade All-American is generally recongized as the most prestigous. In high school basketball it is the McDonald's All-American that carry the most prestige. That doesn't mean that another organization can't come out with a AA list.

In youth wrestling you will see quite a few organizations recognizing their placers as AA. I would say that on the youth level there is no clear cut one that is recognized as the most prestigous. There is nothing that stops your local weekend tournament from calling its placers AA. Its just that no one would care. As the tournaments get tougher more people start caring.