557 (1980) which challenged a public service commission's regulation banning promotional advertising by an electric utility. The Court held that the regulation was a violation of Amendment I because the state interest in ensuring fair and efficient utility rates was not sufficiently linked to the ban. In the case of the electric company, the public service commission's concern over the equality and efficiency of utility rates did not provide a constitutionally acceptable reason for restricting protected speech. The ban on all promotional advertising by the company violated both Amendment I in respect to the freedom of speech, and the Amendment XIV in regards to the Due Process Clause. References External links United States Free Speech Clause case law United States Supreme Court cases United States Supreme Court cases of the Burger Court 1977 in United States case law