What is pass interference in flag football?
In general, interference is a deliberate act, with contact, to
impede a receiver from catching a pass...or an act by a receiver to
prevent defensing a pass (offensive pass interference).
It is most often hitting or grabbing the receiver before the
pass arrives, or a receiver shoving a defender away. If the pass
has not been thrown when a defensive penalty occurs, the lesser
penalty of illegal contact will apply instead.
The rules are different in each level of play (high school,
NCAA, NFL), as are the penalties applied.