1. How are treaties and European law similar or different as sources of law?
Both are international sources that require ratification and have binding effects, but treaties are agreements between States while European law is created by EU institutions.
Explication
Both treaties and European law are international sources of law that require ratification and become binding once ratified. Treaties are agreements between States, whereas European law comprises treaties establishing the EU, secondary legislation, and case law created by EU institutions. They are similar in their binding nature and the requirement of ratification, but differ in origin and scope.