generate questions: The canon law of the Eastern Catholic Churches, which had developed some different disciplines and practices, underwent its own process of codification, resulting in the Code of Canons of the Eastern Churches promulgated in 1990 by Pope John Paul II.
In what ways did the Eastern Catholic Churches's legal systems vary from those of the west? {sep_token} What led to the Code of Canons of the Eastern Churches? {sep_token} When was the law of the Eastern Catholic Churches promoted? {sep_token} Who sponsored the promulgation of Eastern Catholic Church laws? {sep_token} What was the name of the formal version of laws ruling the Eastern Catholic Churches? {sep_token}