law set the minimum age to view a theatrically exhibited R-rated film without adult accompaniment at 18, instead of 17, and categorized the admission of minors to X-rated films as a misdemeanor. The statute remained in force until 2013, when it was ruled to be in violation of the First Amendment. The law was amended in 2013 as to prohibit persons under the age of 18 only if the film was considered "harmful to minors". X replaced by NC-17 In the rating system's early years, "X"-rated films such as Midnight Cowboy (1969) and A Clockwork Orange (1971) were understood to be unsuitable for children, but non-pornographic and intended for the general public. However, pornographic films often self-applied the non-trademarked "X" rating, and it soon became synonymous with pornography in American culture. In late 1989 and early 1990, respectively, Henry: Portrait of a Serial Killer and The Cook, the Thief, His Wife & Her Lover, two critically acclaimed art films featuring strong adult content, were released. Neither film was approved for an MPAA rating, limiting their commercial distribution and prompting criticism of the rating system's lack of a designation for such films. In September 1990, the MPAA introduced the rating NC-17 ("No Children Under 17 Admitted"). Henry & June, previously to be assigned an X rating, was the first film to receive the NC-17 rating instead. Although films with an NC-17 rating had more mainstream distribution opportunities than X-rated films, many theaters refused to screen them, most entertainment media did not accept advertising for them, and many large video outlets refused to stock them. The ratings used from 1990 to 1996 were: Rated G: General audiences – All ages admitted. Rated PG: Parental guidance suggested – Some material may not be suitable for children. Rated PG-13: Parents strongly cautioned – Some material may be inappropriate for children under 13. Rated R: Restricted – Under 17 requires accompanying parent or adult guardian. Rated NC-17: No children under 17 admitted. In 1996, the minimum age for NC-17-rated films was raised to 18, by rewording it to "No One 17 and Under Admitted". The ratings used since 1996 are: Rated G: General audiences – All ages admitted. Rated PG: Parental guidance suggested – Some material may not be suitable for children. Rated PG-13: Parents strongly cautioned – Some material may be inappropriate for children under 13. Rated R: Restricted – Under 17 requires accompanying