When the AFL and the NFL officially merged in 1970, the combined league divided its teams into the American Football Conference (AFC) and the National Football Conference (NFC). It was then decided (officially announced on January 26, 1970) that CBS would televise all NFC teams (including playoff games) while NBC all AFC teams. For interconference games, CBS would broadcast them if the visiting team was from the NFC and NBC would carry them when the visitors were from the AFC. This was in line with the NFL television blackout rules of the time, meaning that every televised game of a local NFL team would be on the same channel (at the time, home games were banned from local TV regardless of sell-out status, while road games are required to be aired in the teams' primary media markets, and select neighboring markets as well, even if it is not the most popular team in the market). The two networks also divided up the Super Bowl on a yearly rotation.