In 1976, the regulation was expanded to include cable television systems in communities with 3,500 or more subscribers. Cable companies saw the regulation by the federal government as an unlawful intrusion into their business practices and immediately started to challenge its legality. In the court case "United States v. Midwest Video Corp.," the Midwest Video Corporation sued the FCC for overstepping its authority in requiring Public-access television channels. The U.S. Supreme Court upheld the FCC's requirements for local origination facilities. However, in 1979, the U.S. Supreme Court ruled in favor of Midwest Video Corp. stating that the FCC's new requirements exceeded the agency's statutory powers as granted to them by Congress and as required by cable operators to provide Public-access television. The FCC was interfering with the agency's First Amendment rights. After the Supreme Court's decision, PEG advocates started work on what became the Cable Communications Act of 1984.