The magazine High Times and weekly newspaper Westword have filed a lawsuit challenging Colorado rules that bar recreational pot shops from advertising in most publications. The lawsuit filed in federal court on Monday claims the rules violate free speech, The Denver Post reported. State regulations only allow the shops to advertise in publications that have "reliable evidence that no more than 30 percent of the publication's readership is reasonably expected to be under the age of 21."

Carolyn Tyler, a spokeswoman for Colorado Attorney General John Suthers, told The Associated Press on Wednesday that lawyers were reviewing the suit and couldn't comment. There are no restrictions on advertising for medical marijuana. Washington, where recreational pot is also legal, also bars marijuana advertising aimed at minors.

- Associated Press