When a copyrighted work is requested to be removed from a service, the phrase "notice and stay down" refers to the need that the service ban the same material from reappearing in the future. It's a phrase used to express this idea. "Presumably authorised by law" situations (such as fair dealing rights) will be protected by safe harbour provisions incorporated into the German parliament's implementation of Article 17, including the prohibition of automatic filtering of uploads containing "minor" amounts of copied content that use less than 50% of the original work. Although this use is permissible, copyright holders may still complain, and providers are still required to compensate copyright holders.