BOISE, Idaho (AP) — A theater is suing the Idaho State Police for threatening to revoke its liquor license after the theater served alcohol while showing "Fifty Shades of Grey."

The Idaho Statesman reports Idaho law prohibits places licensed to serve alcohol from showing movies that depict sexual acts.

ISP says Village Cinema in Meridian served beer and rum to undercover detectives watching the risque "Fifty Shades" in a 21-and-older VIP area. A police spokeswoman said the agency is tasked with upholding the state's laws and whether or not they are valid is a question for the courts to decide.

The cinema claims ISP's attempt to revoke its liquor license is unconstitutional because it violates the First Amendment's free speech protections.

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