on ios9 is enforcement of forward secrecy on ssl traffic happening for sure?

Been reading about the latest ATS policy changes on ios9. We're good with expectation of tls 1.2 -- and app is working thus far in our production environment -- but enforcement of forward secrecy on ssl traffic to our mobile app has major impact to my company's infrastructure. I need to know from Apple, when will this be turned on / enforced for real? Once latest SDK is demanded for xcode builds? We're currently using <key>NSTemporaryExceptionRequiresForwardSecrecy</key>

on ios9 is enforcement of forward secrecy on ssl traffic happening for sure?
 
 
Q