Hm. Well, I hope you're right. AEA might cite the difference from the proposed waiver language as outside proof of that reading. But these understandings have to stand up to the other person's rational reading of the deal, and the deal doesn't become less binding if the other's reading prevails. Fingers crossed.
Again, uninformed speculation on my part, no real expertise to offer on it. Just a union member struck by the plain terms of the deal that seems to concede a fair swathe of jurisdiction to the moving-picture & talkies types.