CRS 29-11.7-103. Regulation - type of firearm - prohibited.
A local government may not enact an ordinance, regulation, or other law that prohibits the sale, purchase, or possession of a firearm that a person may lawfully sell, purchase, or possess under state or federal law. Any such ordinance, regulation, or other law enacted by a local government prior to March 18, 2003, is void and unenforceable.29-11.7-104. Regulation - carrying - posting.
A local government may enact an ordinance, regulation, or other law that prohibits the open carrying of a firearm in a building or specific area within the local government's jurisdiction. If a local government enacts an ordinance, regulation, or other law that prohibits the open carrying of a firearm in a building or specific area, the local government shall post signs at the public entrances to the building or specific area informing persons that the open carrying of firearms is prohibited in the building or specific area.OC cannot be prohibited at large with the exception of the City & County of Denver. The only get away with this because they have Home Rule status under the Colorado Constitution which allows them to go over State law in some cases. The only other municipality in CO that could possibly enact an OC prohibition is Broomfield, as they are their own City & County also. Boulder's "OC regulation" was passed before 3/18/2003 and should be unenforceable because a person in CO may legally posses a loaded openly carried handgun under state law. The Boulder DA is just that; from Boulder. That case would be tossed in front of any judge who didn't want to look like an idiot in front of the appeals court.