For the purpose of legal research, there are two kinds of ethical codes in the United States: model codes and state codes. Model Codes are the ethical rules for lawyers proposed by the American Bar Association. These rules do not have the effect of law, but versions of these rules have been adopted and made into law by the states and the District of Columbia, which makes discussions and analyses of the model rules relevant to many local ethics proceedings.
The current model codes are called the Model Rules of Professional Conduct, but previous codes have had different titles:
Promulgated in 1983 (KF305.A2 A4 1983) and adopted in some form by many states and the District of Columbia. An electronic version of the Model Rules is available on the ABA's website and on Lexis. Annotations and other information about the rules can be found in the sources listed below.
This annotated version contains the full text of the rules and provides extensive citations to cases, articles, and books discussing the issues arising under each rule.