The Children's Internet Protection Act (CIPA) requires schools and libraries that receive federal funding to install content filters on computers with internet access to prevent children from accessing adult content online. It was challenged in court but ultimately upheld by the Supreme Court in 2003. CIPA only applies to institutions that receive federal E-Rate funds and they must adopt policies to block access to inappropriate materials, monitor minors' online activities, and prevent access to hacking information or other unlawful content.