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Federal law in the United States originates with the Constitution, which gives Congress the power to enact statutes for certain limited purposes like regulating commerce. Nearly all statutes have been codified in the United States Code. Many statutes give executive branch agencies the power to create regulations, which are published in the Code of Federal RegulationsThe United States Code of Federal Regulations (CFR is the codification of the general and permanent rules and regulations published in the Federal Register by the executive departments and agencies of the Federal Government. Purpose The CFR exists because and also carry the force of law. Many lawsuits turn on the meaning of a federal statute or regulation, and judicial interpretations of such meaning carry legal force under the principle of stare decisisStare decisis is a Latin term ("to stand by things decided") used in common law to express the notion that prior court decisions must be recognized as precedents, according to case law. This doctrine is not held within most civil law jurisdictions as it i.

As for state law in the United States, American states are separate sovereignThe adjective sovereign is used to refer to a state of sovereignty. Sovereign is another term for monarch. Sovereign can apply to the head of a state, whether that head be one person (monarch) or a group (aristocracy or democracy). It is used in this senss with their own constitutions and retain the power to make laws covering anything not preempted by the federal Constitution or federal statutes. Although nearly all of them started with the same English common law base, the passage of time has resulted in enormous diversity in the laws of the fifty states.

Efforts by various organizations at creating "uniform" state laws have been only partially successful. The most famous examples are the Uniform Commercial CodeThe Uniform Commercial Code is one of the Uniform Acts that attempts to harmonise the law of the fifty U. states in the United States of America. It treats the law of sales and commercial transactions in the United States. This was the first of the Unifor and the Model Penal Code .

Furthermore, states have delegated lawmaking powers to a staggering number of agenciesIn philosophy, law, and other fields, agency is the status of an agent . In philosophy, agency is the capacity to choose actions, normally held to apply only to humans. See human agency. In sociology, agency is the ability of an actor (usually a person, b, countiesOriginally, a county was the land under the jurisdiction of a count (in Great Britain, an earl, though the original earldoms covered larger areas) by reason of that office. The term has since tended to represent a tertiary geographical unit of administrat, citiesA city is an urban area, differentiated from a town, village, or hamlet by size, population density, importance, or legal status. City can also be a synonym for " downtown. Introduction A city usually consists of residential, industrial and business areas, and special district s. And all the state constitutions, statutes and regulations are subject to judicial interpretation like their federal counterparts.

Thus, at any given time, the average American citizen is subject to the rules and regulations of several dozen different agencies, depending upon one's current location and behavior.

Unlike the rest of the country, state law in LouisianaLouisiana is a southern state of the United States of America. It uses the U. postal abbreviation LA . The state is bordered to the west by the state of Texas, to the north by Arkansas, to the east by the state of Mississippi, and to the south by the Gulf is based on the Napoleonic Code, inherited from its time as a French colony. Puerto Rico is also a civil law jurisdiction. However, the criminal law of both jurisdictions has been necessarily modified by common law influences and the supremacy of the federal Constitution.