Google AdSense advertisers and publishers should do whatever they can to stay on top of any AdSense additional policy notifications as they become available. The platform policy rules allow Google to create a consistent and healthy atmosphere for all platform users, advertisers and publishers alike; and any new additions to its policy are intended to improve that atmosphere and make the AdSense platform even more robust and useful.
Now a new feature on the platform promises to alert you to any issues right away. The AdSense additional policy notification feature is being rolled out slowly and should hit your account soon.