 Content-based regulation of television and radio, however, have been sustained by the Supreme Court in various cases. Since there is a limited number of frequencies for non-cable television and radio stations, the government licenses them to various companies. However, the Supreme Court has ruled that the problem of scarcity does not allow the raising of a First Amendment issue. The government may restrain broadcasters, but only on a content-neutral basis. In Federal Communications Commission v. Pacifica Foundation, the Supreme Court upheld the Federal Communications Commission's authority to restrict the use of "indecent" material in broadcasting.
