Civil Litigation-Court Rules
Most courts have adopted rules of procedure and rules of evidence. Those rules of procedure may be contained, to some extent, in the state code (in which case the procedural rules in essence become statutory law), or they may be in a formal set of rules referred to as the rules of procedure. In the federal court system, there is a set of rules referred to as the Federal Rules of Civil Procedure. Many state courts have adopted similar sets of rules of civil procedure.
In addition, there may be a set of rules referred to as the rules of evidence. In the federal court system, there is a formal set of rules referred to as the Federal Rules of Evidence that have been written by the Judicial Conference. Those Federal Rules of Evidence apply in federal court. At the state court level, many states have adopted their own state rules of evidence. Those rules are designed to govern the admissibility of evidence in that state court system.