United States v. American Library Association, 539 U.S. 194 (2003), was a decision in which the United States Supreme Court ruled that the United States Congress has the authority to require public schools and libraries receiving E-Rate discounts to install web filtering software as a condition of receiving federal funding. In a plurality opinion, the Supreme Court ruled that public school and library usage of Internet filtering software does not violate their patrons' First Amendment free speech rights and that the Children's Internet Protection Act is not unconstitutional.