The television network has eight owned-and-operated and over 232 affiliated television stations throughout the United States and its territories. Most Canadians have access to at least one U.S.-based ABC affiliate, either over-the-air (in areas located within proximity to the Canada–United States border) or through a cable, satellite or IPTV provider, although most ABC programs are subject to simultaneous substitution regulations imposed by the Canadian Radio-television and Telecommunications Commission that allow pay television providers to replace an American station's signal with the feed of a Canadian broadcaster to protect domestic programming rights and advertising revenue. ABC News provides news and features content for select radio stations owned by Citadel Broadcasting, which purchased the ABC Radio properties in 2007.