Auto scaling question

Quick question regarding auto scaling that I could't answer myself from reading the docs.

When a fleet is autoscaling down and the protection policy of a fleet is set to full protection. Does gamelift set the PlayerSessionCreationPolicy to DENY_ALL automatically on running gamesessions to prevent new player sessions from entering a game session that should be terminated in time as a result of scaling down?

If not, is there another way to 'mark' gamesessions that should end? So that the instance will gracefully shut down once all sessions are done.

Thanks.