A player makes contact with opposing team's player on the other side of the line of scrimmage before the snap is given. Paitsio (Pinomaa)

When a player enters the neutral zone and makes contact with an opponent before the ball is snapped.

if a player (besides the center) is in the neutral zone and contact occurs prior to the snap; a foul punishable by a 5-yard penalty.

A penalty assessed against the offense, worth 5 yards, in which an offensive player crosses the line of scrimmage before the ball is snapped, making contact with a defensive player.

When a player enters an area beyond the legal limit set by the rules during a penalty kick, free kicks, corner kicks or throw-in.

Being within 10 yards of the ball when a free kick, corner kick, goal kick or penalty kick is being taken by an opponent. Law 13

Encroachment is when a player enters the neutral zone before the ball is live, causing the ball to remain dead.

A penalty where a defender is in the neutral zone before the ball is snapped. Result upon acceptance of the penalty is 5 yards.