High Quality Content by WIKIPEDIA articles! The choice of law rules in the conflict of laws in the United States have diverged from the traditional rules applied internationally. Choice of law is a procedural stage in the litigation of a case when it is necessary to reconcile the differences between the laws of different states, and in the U.S. between individual federated states. The outcome of this process potentially requires the courts of one jurisdiction to apply the law of a different jurisdiction in lawsuits arising from, say, family law, tort or contract.