The Hays Code (1930)

Here is a link to the text of the Production Code of 1930.  It was fully instituted in 1934 and filmmakers spent much energy trying to get around it until the 1960s when it finally died a slow death.  The system imposed by the industry after that was the one we have today; the MPAA with its G, PG, R and NC-17 ratings.  Enjoy.

http://www.artsreformation.com/a001/hays-code.html