U.S. v. American Library Association Precedents:

1. Miller v. California (1973): The Court established a test for obscenity as: whether the average person applying contemporary community standards would find that the material taken as a whole appeals to prurient interest; whether the work depicts or describes in a patently offensive way sexual conduct specifically defined by the applicable state or federal law to be obscene and whether the work taken as a whole lacks serious literary artistic political or scientific value.
2. South Dakota v. Dole (1987): The Court ruled that Congress has wide latitude to attach conditions to the receipt of federal assistance to further its policy objectives but may not induce the recipient to engage in activities that would themselves be unconstitutional.
3. Rust v. Sullivan (1991): When the Government appropriates public funds to establish a program it is entitled to broadly define that program's limits.
4. NEA v. Finley (1998): The Court upheld an art funding program that required the N.E.A. to use content-based criteria in making funding decisions.
5. Legal Services Corporation v. Velazquez (2001): The Court held that when the Government seeks to use an existing medium of expression and to control it in a class of cases in ways which distort its usual functioning the distorting restriction must be struck down under the First Amendment.
6. Ashcroft v. Free Speech Coalition (2002): The Supreme Court decided that the Government may not suppress lawful speech as the means to suppress unlawful speech.