The legal system of States is entirely structured upon the legal tradition of common law which is closely related to each other, except for the Louisiana State that still shows of the law traces of France such as the book of the law of Civil of the 1808th. The States each maintain and develop the rule of law in the fields, such as contract law, corporations law, criminal law, family law, inheritance law, property law, tort, and the conflict of laws (international private law). Meanwhile, the law of the sea, bankruptcy, and patent law are regulated by federal rules.