Law of Louisiana
Law in the state of Louisiana is based on a more diverse set of sources than the laws of the other forty-nine states. Private law--that is, substantive law between private sector parties--has a civil law character, based on French and Spanish codes and ultimately Roman law, with some common law influences. Louisiana's criminal law largely rests on English common law. Louisiana's administrative law is generally similar to the administrative law of the U.S. federal government and other U.S. states. Louisiana's procedural law is generally in line with that of other U.S. states, which in turn is generally based on the U.S. Federal Rules of Civil Procedure.
The Louisiana Revised Statutes (R.S.) contain a very significant amount of legislation, arranged in titles or codes. Apart from this, the Louisiana Civil Code forms the core of private law, the Louisiana Code of Civil Procedure (C.C.P.) is the civil procedure code, the Louisiana Code of Criminal Procedure (C.Cr.P.) is the criminal procedure code, the Louisiana Code of Evidence is the evidence code, and the Louisiana Children's Code (Ch.C.) is the juvenile code.
The Louisiana Administrative Code (LAC) contains the compilation of rules and regulations (delegated legislation) adopted by state agencies. The Louisiana Register is the official journal of regulations and legal notices issued by the executive branch.
There is no longer (since 1972) an official case reporter and courts themselves decide which decisions are published. Decisions of the Louisiana Supreme Court and Louisiana Court of Appeal are available in paper and via the Internet, while trial court decisions are not published. The Code of Civil Procedure provides for the posting of unpublished opinions of the Supreme Court and the courts of appeal on the Internet and provides that such opinions may be cited as authority. Slip opinions are available from the courts, while advance sheets and bound volumes of the case reports are contained in the Louisiana Cases (a Louisiana-specific version of the Southern Reporter).
The Louisiana Revised Statutes provide that the maximum penalty for the violation of a parish ordinance is a fine of $500 and imprisonment for 30 days in the parish jail, and that the maximum penalty for the violation of an ordinance of a municipality organized under the mayor and board of aldermen form of government is a fine of $500 and imprisonment for 60 days. A number of subjects are regulated, restricted, and preempted by state law as the subject of local ordinances.
The first Louisiana Civil Code Digest of 1808 was written in French and subsequently translated into English. For many years legal practitioners in the state made great effort to ensure that both versions agreed. Despite those efforts some clauses were found only in one version or the other. Due to modern legislative enactments which repeal and reenact Louisiana's civil code articles as any other collection of statutes, the differences between the original French and the English translation are now primarily of historical interest.
Despite popular belief (and Stanley Kowalski's brief explanation in the Tennessee Williams play A Streetcar Named Desire) it is incorrect to say that the Louisiana Civil Code is, or derives from, the Napoleonic Code; rather, the two law codes stem from common sources. Although the developing Napoleonic Code strongly influenced Louisiana law, it was not enacted until 1804, one year after the Louisiana Purchase. The main source of Louisiana jurisprudence may in fact be Spanish. Currently, the Louisiana Civil Code consists of 3,556 individual code articles.
Great differences exist between Louisianan civil law and common law found in all other American states. While many differences have been bridged due to the strong influence of common law, the "civilian" tradition is still deeply rooted in Louisiana private law and in some parts of criminal law.
One often-cited distinction is that while common law courts are bound by stare decisis and tend to rule based on precedents, judges in Louisiana rule based on their own interpretation of the law. This distinction is not absolute, though. Civil law has its own respect for established precedent, the doctrine of jurisprudence constante. But the Louisiana Supreme Court notes the principal difference between the two legal doctrines: a single court decision can provide sufficient foundation for stare decisis, however, "a series of adjudicated cases, all in accord, form the basis for jurisprudence constante."  Moreover, Louisiana Courts of Appeals have explicitly noted that jurisprudence constante is merely a secondary source of law, which cannot be authoritative and does not rise to the level of stare decisis. 
Property, contractual, business entities structure, much of civil procedure, and family law are still strongly influenced by traditional Roman legal thinking. Louisiana law retains terms and concepts unique in American law: usufruct, forced heirship, redhibition, and lesion beyond moiety are a few examples.
Due to the civil law tradition, Louisiana's constitution does not contain a right to a trial by jury in civil cases, although this right is contained in the Louisiana Revised Statutes. Additionally, appellate courts have a much broader discretion to review findings of fact by juries in civil cases. Also, damages are apportioned differently from in common law jurisdictions; specific performance is almost always available, and juries may hear cases that would be considered equitable in other jurisdictions.
In commercial law, the 49 other states have completely adopted the Uniform Commercial Code standardizing the rules of commercial transactions. Louisiana enacted most provisions of the UCC, except for Article 2, which is inconsistent with civil law traditions governing the sale of goods. However, several articles regarding the incorporation of terms into a contract have been adopted into the Civil Code. Louisiana also refers to the major subdivisions of the UCC as “chapters” instead of articles, since the term “articles” is used in that state to refer to provisions of the Louisiana Civil Code.
Legal careers are also molded by the differences. Legal education, the bar exam, and standards of legal practice in Louisiana are significantly different from other states. For example, the Louisiana Bar Exam is the longest of any state, at 21.5 hours. The Multistate Bar Examination is not administered in Louisiana.
- "How the Code Napoleon makes Louisiana law different". LA-Legal. Retrieved 2006-10-26.
- Parise, Agustín (2014). "Private Law in Louisiana: An Account of Civil Codes, Heritage, and Law Reform". In César Rivera, Julio. The Scope and Structure of Civil Codes. Springer. p. 434. doi:10.1007/978-94-007-7942-6. ISBN 978-94-007-7942-6. LCCN 2014930754.
- Parise 2014, p. 453.
- "Louisiana, LAC, Administrative Code". Louisiana Office of the State Register. Retrieved 28 December 2014.
- "Louisiana Register". Louisiana Office of the State Register. Retrieved 28 December 2014.
- Palmer, Vernon Valentine; Borowski, Harry (2012). "Louisiana". In Palmer, Vernon Valentine. Mixed Jurisdictions Worldwide: The Third Legal Family (2nd ed.). Cambridge University Press. pp. 298–299. ISBN 978-0-521-76857-3.
- "Locating Louisiana Court Decisions" (PDF). Law Library of Louisiana. Retrieved 28 December 2014.
- "Local Rules of Court". Louisiana Court of Appeal, Second Circuit. Retrieved 28 December 2014.
Act No. 644 of the Regular Session 2006 enacted Code of Civil Procedure Article 2168 which provides for the posting of unpublished opinions on Internet websites and provides that such opinions may be cited as authority.
- R.S. 33:1243
- R.S. 33:362
- State Law in Louisiana affecting Local Codes & Ordinances (PDF). Municode. Retrieved 28 December 2014.
- George Dargo. Mainstreaming Louisiana Legal History Review of Fernandez, Mark F., From Chaos to Continuity: The Evolution of Louisiana’s Judicial System, 1712-1862. H-Law, H-Net Reviews. August, 2002
- William Q De Funiak, a prominent legal authority on community property law and its development in the United States, maintained, in his "Principles of Community Property" (2d ed. 1971), that, whatever the source of other Louisiana law may be, the Louisiana law of community property is principally derived from the law of Spain.
- Louisiana Civil Code Reference
- Engber, Daniel (September 12, 2005). "Louisiana's Napoleon Complex: The French influence on Pelican state jurisprudence". Slate. Retrieved 2006-10-26.
- Willis-Knighton Med. Ctr. v. Caddo-Shreveport Sales & Use Tax Comm'n., 903 So.2d 1071, at n.17 (La. 2005). (Opinion no. 2004-C-0473)
- Royal v. Cook,, 984 So.2d 156 (La. Ct. App. 2008).
- Hargrave, W. Lee (1990). The Louisiana state constitution: a reference guide, Volume 37. Greenwood Pub Group. p. 39. ISBN 0-313-26654-9.
- Palmer, Vernon Valentine (2012). Through the Codes Darkly: Slave Law and Civil Law in Louisiana. Clark, LA: Lawbook Exchange. ISBN 978-1616193263.
- Rault, Jr., Gerard A. (1989). "An Overview of the New Louisiana Code of Evidence — Its Imperfections and Uncertainties". Louisiana Law Review 49 (3): 697–731.
- Search Louisiana Laws. Official site of Louisiana State Legislature
- Louisiana Supreme Court. Official site of Louisiana Supreme Court.
- Louisiana Administrative Code from the Louisiana Office of the State Register
- Louisiana Register from the Louisiana Office of the State Register
- Local ordinance codes from Public.Resource.Org
- Civil law to Common Law dictionary. Unofficial, self-archived copy of 1995 newsletter article, from personal website of Stephan Kinsella.