PORTLAND, Ore. - Oregon State University professor Jon Lewis will lead a discussion of the Motion Picture Association of America (MPAA) and its film ratings process after a Saturday, Sept. 16, showing on opening weekend of the new documentary, "This Film Is Not Yet Rated."

Lewis is featured prominently in the film, which opens Sept. 15 at Cinema 21 in Portland. His 2000 book, "Hollywood v. Hard Core: How the Struggle Over Censorship Created the Modern Film Industry," caught the attention of director Kirby Dick, who was nominated for an Oscar for his 2004 documentary on sexual abuse in the Catholic Church titled "Twist of Faith."

Lewis will introduce the 7 p.m. showing and lead a 20-minute discussion with audience members following the film.

Cinema 21 is at 616 NW 21st Ave., Portland.

"This Film Is Not Yet Rated" is rated NC-17.

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