Facebook October 2013 breaking changes - webview login

Facebook October 2013 breaking changes - webview login

In
https://developers.facebook.com/blog/post/2013/06/26/october-2013-platform-changes/
"Native iOS or Android apps initiating their own web views for Facebook
login are required to use our official SDKs for login by October 2, 2013.
Native iOS or Android apps using third-party SDKs that provide Facebook
login via custom web views have an extension until January 8, 2014 to work
with their third-party provider to resolve this or to migrate to our
SDKs."
I'm using the Facebook SDK without single sign on.
Will the changes be effective from October 2, 2013 or January 8, 2014?
What are exactly 'third-party SDKs'?