The broadcast of educational children's programming by terrestrial television stations in the United States is mandated by the Federal Communications Commission (FCC), under regulations colloquially referred to as the Children's Television Act (CTA), the E/I rules, or the Kid Vid rules. Since 1997, all full-power and Class A low-power broadcast television stations have been required to broadcast at least three hours (or more if they operate digital subchannels) per-week of programs that are specifically designed to meet the educational and informative (E/I) needs of children aged 16 and younger. There are also regulations on advertising in broadcast and cable television programming targeting children 12 and younger, including limits on ad time, and prohibiting the airing of advertising for