Have you all seen this column by markbreit

[JugglingReferee]

Originally posted by TXMike
I recall the Miami-Ohio State game a few years ago when there was a significant dispute about a pass interference call near the end of the game. If you had seen those exchanges you would see how willing we are at times to question one another.

I bought the poster that was advertised showing the DPI. AIR, the general public learned a bit about our mechanics after that sitch. They wondered why the sideline official didn't throw the PI when it was 'right in front of him'. The deep guy throew the flag.

The answer is simple: keys. AKA, primary responsibility.