That a commercial contract is international may seem intuitive to some observers, yet it is difficult to find an accepted definition for the term. What is even more difficult is identifying the legal rules to which international commercial contracts are subject. Are international contracts subject to some sort of international law? What are the sources of this law and what is its scope of application? To the extent that international contracts are subject to national rules, which law’s rules are applicable? These questions become even more pressing when the practice of international contracting is taken into consideration: contracts are often written as if their terms were the only source with which to regulate the parties’ relationship and as if any sources of law were irrelevant.