The Birmingham market would not get a third commercial broadcast television outlet until WBMG-TV (channel 42, now WIAT) began in October 1965. Although WBMG nominally had a CBS affiliation, the network allowed WAPI-TV to continue airing its higher-rated programs. This was largely because WBMG had launched only one year after the FCC's All-Channel Receiver Act went into law, requiring that television sets manufactured from 1964 onward include all-channel tuning; relatively few households in the area at the time had sets with built-in UHF tuning capability, or expensive converter boxes that enabled older television sets to pick up UHF signals. Compounding things, channel 42 operated at a comparatively low effective radiated power, producing a signal that was considerably weaker than that of either WAPI-TV or WBRC-TV. To fill out its schedule, WBMG aired some NBC programs that WAPI-TV turned down or otherwise had no room to broadcast on its schedule (such as "The Tonight Show"). Both stations listed "CBS/NBC" as their affiliation, as WBMG maintained a nominal secondary affiliation with the latter network. On April 3, 1967, WAPI-TV became the first television station in Birmingham to broadcast all of its programming in color, having acquired camera, projection and slide equipment to broadcast local and acquired programming in the format, in addition to carrying NBC and CBS programs available in color.