I don't know the full details but this sounds like a small victory for AE over The Broadway League.
The League also agrees that going forward its members will only use non-disclosure language in contracts or riders in limited, approved circumstances, such as protecting intellectual property or financial information. Producing members of The Broadway League may no longer use NDAs to silence actors and stage managers who want to speak out against workplace harassment, bullying or discrimination. Equity intends to bring similarly protective language forward in negotiations with their other bargaining partners in support of creating a new industry standard.