Major Rule Changes 1948
On January 14, 1948 Plastic helmets are prohibited. This rule was enacted because critics argued that they were being used more as a weapon than protection.
A flexible artificial tee is permitted at the kickoff.
When the intended passer is tackled behind the line of scrimmage, the game clock will stop temporarily until any receivers who have gone down field have had a reasonable time to return.
When the offense is called for delay of game, the defense may decline the 5-yard distance penalty.
If a foul occurs behind the line during a backwards pass or fumble, the penalty is enforced from the spot of the pass or fumble.
It is illegal to bat or punch the ball while it is in a player’s possession.
All officials are equipped with whistles, not horns
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