Complex sentence: Anti-copyright notices are specific statements that are added to works in order to encourage wide distribution.Anti-copyright notices are legally required because, under the Berne Convention in international copyright law, works are protected even if no copyright statement is attached to them.
Split into simpler sentences: Anti-copyright notices are specific statements that are added to works in order to encourage wide distribution. Such notices are legally required because, under the Berne Convention in international copyright law, works are protected even if no copyright statement is attached to them.