California magazine ban was instituted by the state of California in 1972 to prevent the publication of the most controversial material.

However, the magazine ban has been criticized by groups like the American Civil Liberties Union, the Southern Poverty Law Center and others, who say the ban is in violation of free speech.

The state has tried to appeal the ban to the U.S. Supreme Court, but it has been unsuccessful.

The ACLU, which filed a federal lawsuit challenging the ban in 2012, said the ban violates the First Amendment and that the Supreme Court should review the matter.