Context: There are many rules to contact in this type of football. First, the only player on the field who may be legally tackled is the player currently in possession of the football (the ball carrier). Second, a receiver, that is to say, an offensive player sent down the field to receive a pass, may not be interfered with (have his motion impeded, be blocked, etc.) unless he is within one yard of the line of scrimmage (instead of 5 yards (4.6 m) in American football). Any player may block another player's passage, so long as he does not hold or trip the player he intends to block. The kicker may not be contacted after the kick but before his kicking leg returns to the ground (this rule is not enforced upon a player who has blocked a kick), and the quarterback, having already thrown the ball, may not be hit or tackled.

Question: What is the term for the player that is currently handing the football when play is underway?
Answer: ball carrier

Question: Within what distance from the line of scrimmage can offensive players who do not have the ball be legally contacted by defensive players?
Answer: one yard

Question: What are two illegal ways to block an opposing player's progress near the line of scrimmage?
Answer: hold or trip

Question: Which player may not be tackled immediately after they have thrown a pass?
Answer: quarterback

Question: What player can be legally tackeled when tripping the player he intends to block?
Answer: Unanswerable

Question: What player can't be interfered with unless he is within one yard of any player?
Answer: Unanswerable

Question: Which player may not be contacted after the kick after throwing a pass?
Answer: Unanswerable

Question: What are two illegal ways to currently be in possession of the ball near the line of scrimmage?
Answer: Unanswerable

Question: When is the rule applied where the offensive player may not be contacted?
Answer: Unanswerable