The notifications have not been released yet, but I can sense they be on their way, especially due to the holiday weekend. Watch for it.
This is at the top of the margins page at AMP as of 9/3/20, 8pm (pst)... https://www.ampfutures.com/trading-info/margins/
The current margin requirements are adequate and protect the firms/exchanges, although they have the right to change them at any time. The recent moves were not a surprise or unexpected considering the levels we are currently at. If margin requirements are an issue for someone, then that individual probably shouldn't be trading.