The
1917 Code of Canon Law, also referred to as the
Pio-Benedictine Code, was the first official comprehensive codification of Latin
canon law. It was promulgated on 27 May 1917 and took legal effect on 19 May 1918. It was in force until the
1983 Code of Canon Law took legal effect and abrogated it on 27 November 1983. It has been described as "the greatest revolution in canon law since the time of
Gratian" (1150s AD).