Most of England`s criminal laws have been codified, not least because it allows for the accuracy and security of prosecutions. However, the major areas of the common law, such as contract law and the law of wrongdoing, remain largely intact. Over the past 80 years, there have been statutes that address immediate problems, such as the Reform (Frustrated Treaties) Act of 1943 (which was subject to empty war contracts) and the Contracts (Rights of Third Parties) Act 1999, which changed the doctrine of privity. However, no progress has been made on the adoption of Harvey McGregor`s Treaty Code (1993), although the Law Commission, in collaboration with the Scots Law Commission, has asked it to put forward a proposal for the comprehensive codification and unification of contract law in England and Scotland. Similarly, the codification in the law of unlawful action was at best fragmentary, a rare example of progress being the Act of Reform of the Law (complacent negligence) of 1945. The first permanent system of codified laws could be found in imperial China,[Note 1], with the compilation of the tang code in 624 AD. This served as the basis for the Chinese penal code, which was eventually replaced by the code of major issues, which was abolished in 1912 after the Xinhai Revolution and the creation of the Republic of China. The new laws of the Republic of China were inspired by the German codification work, the Civil Code. A very influential example in Europe was the French Napoleonic code of 1804.
The Law on Transactions related to the Sale of Goods is highly standardized at the federal level by the widespread adoption of the Single Trade Code. The interpretation of other types of contracts remains very different depending on the extent to which a given state has codified its common law of treaties or accepted parts of the (second) restatement of contracts. A contract is an agreement between two or more parties that creates reciprocal obligations that can be imposed by law. The elements of the contract are mutual consent, offer and acceptance, consideration and legal purpose.  The common law has been codified in many legal systems and in many areas of law: for example, prison codes in many legal systems, including the California Civil Code and the consolidated laws of New York. The new codification refers to a process in which existing codified statutes are reformatted and rewritten in a new codified structure. This is often necessary, because the legislative procedure to amend the statutes and the legal procedure for interpreting statutes naturally leads, over time, to a code containing archaic terms, replaced texts and superfluous or contradictory statutes. Because of the size of a typical code of government, the legislative process of recoding a code can often take a decade or more. The rules and regulations adopted by the executive authorities of the U.S.
federal government are codified as the Code of Federal Regulations. These regulations are authorized by specific enabling laws adopted by the legislature and generally have the same force as the legal law. Since each act of congress may contain laws on a large number of subjects, many legal acts or parts of legislation are also reorganized and published in a technical codification updated by the Office of the Law Revision Counsel.