International law is a widely growing theory of law in the present time. there was't any idea of international law in old time. By the growth of the law fields and the dependencies of various states...
International law, at least that contained in treaties, is not actual law. Depending on where you're from, it may have a different position in the hierarchy of norms though (i.e. the 'ranking' of the...
It means essentially the same thing as the current 'in-vogue' phrase, "It is, what it is." It means the law is not negotiable. It may not seem just in some cases but it is, above all else, the law.
Statutes rule! Regulations are just rules for carrying out the law the legislature made by statute. If the regulation is inconsistent with the statute (and sometimes they are) they can be challenged...