WP 2 will examine the case-law of international judicial and quasi-judicial bodies, in order to induce from it the rules of interpretation of CIL and their precise content. It will provide answers not only as to the exact content of these rules, but also as to their nature. These rules of interpretation may be legal stricto sensu, but they may also be principles/approaches/maxims/rules of logic, which also have content but may not be binding per se on the interpreter.