Reno v. American Civil Liberties Union, 521 U.S. 844 (1997), is a landmark decision of the Supreme Court of the United States, unanimously ruling that anti-indecency provisions of the 1996 Communications Decency Act violated the First Amendment's guarantee of freedom of speech. This was the first major Supreme Court ruling on the regulation of materials distributed via the Internet.

Background and procedural history

The Communications Decency Act (CDA) was an attempt to protect minors from explicit material on the Internet by criminalizing the knowing transmission of "obscene or indecent" messages to any recipient under 18; and also knowingly sending to a person under 18 anything "that, in context, depicts or describes, in terms patently offensive as measured by contemporary community standards, sexual or excretory activities or organs." The American Civil Liberties Union argued that certain parts of the act were facially unconstitutional and sought a preliminary injunction preventing the government from enforcing those provisions.

Section 561 of the act required that any facial challenges be heard by a panel of three district judges; that panel granted the injunction. Because the act also permitted appeals to be heard directly by the Supreme Court, that court took the case without the usual intermediate appellate decision. The government's main defense of the CDA was that the Supreme Court had upheld similar decency laws in three prior decisions: Ginsberg v. New York (1968); F.C.C. v. Pacifica Foundation (1978); and Renton v. Playtime Theatres, Inc. (1986).

In Ginsberg v. New York, the Supreme Court ruled that material that is not obscene may nonetheless be harmful for children, and its marketing may be regulated. The two dissented in part, writing they would have invalidated a narrower portion of the two CDA provisions under review.