I would point out, as long as you don't say you are AEA on the resume, I don't think you need to point out that you AREN'T AEA.
This gets into weird HR rules that vary from state to state - but I know at some theaters I have worked at - I was not allowed to ask about union status for union jobs (Although I could point out a position would be AEA or not AEA.)
Now a savy person hiring will be able to figure out - as long as you are not lying or "fudging" on your resume - such as listing yourself as ASM in AEA House, when you really where a PA.
If someone asks if you are AEA, and your aren't . . . then be prepared for why you think this is the right job to take the next step in your career.