Before 1940, a clipping penalty was a 25-yard penalty from the spot of the foul. From 1940 to today, the penalty is 15 yards. At some time during the 1990, all levels of football adopted the Block in the Back rule that partially cleaned up the clipping rule further.

Before this change, almost any block from behind was considered a clip. The Block in the back fouls are blocks from behind above the waist and have a ten-yard penalty, while the clip was limited to behind the back below the waist of the offended player.