Football legalized the forward pass in 1906, and an earlier Tidbit covered how the game lacked a pass interference penalty until 1908. Pass interference entered the game in 1908 as part of the illegal use of hands foul, which resulted in a 15-yard penalty when committed by the offense and a 5-yard penalty when called on the defense. By 1910, the rule makers modified the rule so that pass interference by the offense resulted in a loss of a down and a 10-yard penalty when called on the defense.