sometimes request a time extension. Furthermore, broadcasters with NFL contracts are required to show their markets' road games, even if the secondary markets have substantial fanbases for other teams (like in Harrisburg, Pennsylvania, officially a Baltimore Ravens secondary market, but home to many Pittsburgh Steelers fans). Sometimes if a game is within a few hundred tickets of selling out, a broadcaster with rights to show the nearly sold-out game will buy the remaining tickets (and give them to local charities) so it can broadcast the game. Other teams elect to close off sections of their stadium, but cannot sell these tickets for any game that season if they choose to do so. As a result, if the home team's game is a Sunday day game, both networks can air only one game each in that market (until 2000, this rule applied whether or not the game was blacked out; however, this was changed because some markets virtually never aired doubleheaders as a result). Usually, but not always, when each network can show only one game each in a market, the two stations work out between themselves which will show an early game and which will show a late game. This only affects the primary market, and not markets in a radius, which always get a doubleheader each Sunday. For the NFL International Series, the network broadcasting an International Series game will not have the game blacked out for the team's markets as the game is played outside of the United States; however, some blackout regulations do apply. There have been two exceptions to the rule, of which one has never been implemented and the other no longer applies. The first is for the Green Bay Packers, which have two overlapping 75-mile blackout zones – one surrounding the team's stadium in Green Bay and another surrounding Milwaukee. The team's radio flagship station is in Milwaukee, and the Packers played part of their home schedule in Milwaukee from 1953 through 1994. However, this policy has never been implemented in the Packers' case, as they have sold out every home game in Green Bay since 1960 and have a decades-long season-ticket waiting list (games in Milwaukee also sold out during this period). The second exception was for the Bills Toronto Series; by a technicality, Rogers Communications (the team's lessee) owned all tickets to those games and resold them to potential fans. Even when