Federal Rules of Civil Procedure
(pdf) (eff. Dec. 1, 2019) govern civil proceedings in the United States district courts. Their purpose is "to secure the just, speedy, and inexpensive determination of every action and proceeding." Fed. R. Civ. P. 1. The rules were first adopted by order of the Supreme Court on December 20, 1937, transmitted to Congress on January 3, 1938, and effective September 16, 1938.