Enforce in blocking mode

If you built the policy automatically using the Policy Builder and the policy builder is still enabled for this security policy then yes the items you mention would be enforced (otherwise known as "take out of staging") automatically.

 

However, if the policy was created manually or the automatic builder has been disabled then you must manually enforce these items.

 

This allows you to have a security policy in blocking mode and add new entities in staging giving you time to test for false positives.