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In American and Canadian gridiron football, pass interference (PI) is a foul that occurs when a player interferes with an eligible receiver's ability to make a fair attempt to catch a forward pass. Pass interference may include tripping, pushing, pulling, or cutting in front of the receiver, covering the receiver's face, or pulling on the receiver's hands or arms. It does not include catching or batting the ball before it reaches the receiver. Once the ball touches any defensive player or eligible offensive receiver the above rules no longer apply and the defender may tackle the receiver or attempt to prevent him from gaining control of the ball. Once a forward pass is in the air it is a loose ball and thus any eligible receiver – all defensive players are eligible receivers – may try to catch it. When a defensive player catches a forward pass it is an interception and his team gains possession of the ball. Some actions that are defined as pass interference may be overlooked if the defender is attempting to catch or bat the ball rather than focusing on the receiver. The intended receiver may find himself a defender if a defensive player has a better chance to catch a forward pass. If an offensive player commits pass interference against a defensive player attempting to intercept a forward pass it is offensive pass interference. ==Variations== Rules for pass interference differ between American and Canadian football: * Pass interference rules in American high school and college football clearly cover only forward passes that travel beyond the neutral zone. In the NFL, the official rule is that "there can be no pass interference at or behind the line of scrimmage". In Canadian football, pass interference rules are applied throughout the field of play. This leads to differences in the application of the rule on screen passes in which the intended receiver is behind the line of scrimmage: * * A defender who makes contact with an intended receiver behind the line of scrimmage cannot be called for pass interference at any level of American football, although he may still be guilty of a different foul. The NFL is specific about which foul could be called in that situation, stating that "defensive actions (the line of scrimmage ) such as tackling a receiver can still result in a 5-yard penalty for defensive holding, if accepted."〔 In the same situation in Canadian football, the defender can be called for pass interference if his contact is deemed illegal. * * Offensive pass interference cannot be called behind the line of scrimmage in American football. In Canadian football, although the pass interference rule applies, offensive players are explicitly allowed to interfere with a defender attempting to intercept a screen pass (within certain limitations). * If the pass is deemed to be "uncatchable", pass interference rules do not apply in American college football or the NFL, and starting with the 2010 season they do not apply in Canada. This rule does not apply in American high school football. In the NFL, the defender may make continuous contact with receiver within the first five yards of the line of scrimmage. Anything after that is penalized as illegal contact. Pass interference is called if the defensive player contacts the offensive player while he is trying to catch the pass, unless the defender has turned his head to face the oncoming pass and is attempting to intercept it. Accidental, glancing contact is not penalized. In high school and college, the defender may make contact with the receiver as long as the receiver is in front of the defender. These provisions end when the pass is in the air. If the incident occurred on a special teams fake play, the rule does not apply under NFL rules. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pass interference」の詳細全文を読む スポンサード リンク
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