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.
Roughing the passer, defensive pass interference, offsides
Yes.
Pass Interference
ofsides ,false start, and pass interference
In traditional flag football like traditional football there are no forward laterals. In Air Force Flag Football you can pass the ball both backwards and forwards as much as you want. Think of it like ultimate frisbee with a football.
interception
In the NFL, there is no such thing as pass interference (PI) on forward passes that do not go past the line scrimmage but I recently watched a college football game in which a PI was called on a forward that never reached the line of scrimmage even though I always believed that there is no such thing as PI if such pass was in the backfield (behind the line of scrimmage). So I am not clear on the rule concerning passes that do not cross the line of scrimmage, in college football.
Flag football or touch football
Offense-Holding/False Start Defense- Pass Interference/Offside
No, it is against the rules in football to tackle a receiver before he catches the ball. This would result in a penalty for defensive pass interference.
Yes. As long as you do not touch the receiver of the pass or block his/her's vision of the ball. If you do touch or 'face guard' the opponent then you will be called for pass interference.
flag football flag football