On July 22 1946
July 22-23, 1946: The Conference of Conferences is held in Chicago, resulting in the development of the “Principles for the Conduct of Intercollegiate Athletics.” Five points of the principles — known as the “Sanity Code” — formally were adopted in 1948.
Sources:
Sources: “In the Arena: The NCAA’s First Century” by Joseph N. Crowley, NCAA News and Champion magazine archives, the NCAA Media Center, and NCAA record books