\-**1915** In *Mutual Film Corporation v. Industrial Commission of Ohio*, the Supreme Court holds that movies are not protected by the First Amendment. The ruling allows state and local boards to continue censoring films.
**-1922** The Motion Picture Producers and Distributors of America (MPPDA), later to become the Motion Picture Association of America (MPAA) is formed, led by Former Postmaster General William H. Hays.
**-1956** MPAA initiates a review of the Production Code, which results in loosening its prohibitions on the portrayal of drug use, abortion, miscegenation, prostitution, and abortion. The revised code added a prohibition on blasphemy and ridiculing the clergy.
**-1968** MPAA institutes a nationwide system of voluntary ratings based on the viewer's age, in response to continuing objections to the Production Code, and to court rulings indicating that different First Amendment standards apply to adults and minors. The original ratings are G for General Audiences, M for Mature Audiences, R for 16 and above, unless accompanied by a parent or guardian, and X, under 16 not admitted.
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