C'mon, guys, lay off BCbud. He's alright. He just asked about a simple interpretation of the rules. Does a slight bump of two helmets result in a foul, that is all.
The overall rule has been in existence forever. Heck, when I played high school football forty years ago, leading with the helmet was illegal (and was so in the NFL). We referred to such a tackle as a "spear tackle," and it was an automatic 15 yard penalty. Leaving one's feet to lead with the helmet was called a "missile tackle" and was an automatic ejection from the game. This in a day and age when moves such as forearm shiver, today and automatic 15 yard penalty (and most likely an ejection), were an expected part of the game. Form tackling was taught to lead with the face mask into the center of mass of the ball carrier (including the quarterback), wrap your arms around the player, lift and drive. Any type of headbutting was illegal, but, otherwise, incidental face mask into face mask was fine.
Bc's question, if I understand it correctly, is whether the ever so slight contact on the play (if I remember correctly, a minor click between two face masks), constituted a penalty. I saw nothing there, as did about fifty million people. The NFL allows the referees on the field a great deal of leeway to interpret such plays. As such, in my opinion, the call was ridiculous. Perhaps the NFL can try to hide behind the letter of the law. If so, the league should (once again) be ashamed of itself.
Just my take.
Big Hitter