"NBC Sunday Night Football is the beneficiary of the league's new flexible-scheduling system. For the final seven weeks of the season (seven of the final eight weeks during the 2006 season because of Christmas weekend), the NFL has the flexibility in selecting games to air on Sunday night, stating that fans will be able to vote for what game they would like to see on the Sunday primetime slot. During those affected weeks, no game is initially scheduled for NBC—instead, the schedule slot for the NBC game is listed as "To be announced", and one Sunday afternoon game will be moved to the primetime slot. The NFL did earmark specific games for Sunday Night Football in Weeks 10-15 and 17 when the official schedule came out in April 2006.[1] CBS and FOX could each protect four of its games during Weeks 10-15 and also each protect one of its games for Week 17; however, these two networks had to decide which games to protect in early October 2006, after Week 4 of the NFL season.[1]"