the pass. Double touching of a forward pass is legal, but batting a pass towards the opponent's end zone is illegal. Previously, a second offensive player could not legally catch a deflected pass unless a defensive player had touched it. This is usually referred to as the "Mel Renfro Rule". During a play in Super Bowl V, Baltimore Colts receiver Eddie Hinton tipped a pass intended for him. Renfro, the Cowboys defensive back, made a stab at the ball and it was ruled that he tipped it ever so slightly (which he denied) into the arms of Colts tight end John Mackey, who ran for a touchdown. Later, this rule was also the one in question during the Immaculate Reception in 1972. But despite these two incidents, the rule change did not occur until this season. The pass blocking rules were extended to permit extended arms and open hands. The penalty for intentional grounding is reduced from a loss of down and 15 yards to a loss of down and 10 yards from the previous spot (or at the spot of the foul if the spot is 10 yards or more behind the line of scrimmage). If the passer commits the foul in his own end zone, the defense scores a safety. A five-yard penalty and ten-second runoff is to be applied if a team intentionally commits a penalty or foul to stop the clock. Hurdling is no longer a foul. A seventh official, the Side Judge, is added to the officiating crew to help rule on legalities downfield and serve as a second umpire on field goals and extra points. The addition of fifteen officials (one per crew) forced three-digit numbers to be used for the first time. (The sixth official (line judge) was added thirteen years earlier.) All stadiums must have arrows by the numeric yard markers indicating the closer goal line. Regular season New interconference scheduling The change to a 16-game season also marked the start of a new scheduling format that saw a division in one conference play a division in another conference, rotating every season and repeating the process every three years. A change was also made to non-divisional opponents in a team's own conference, which became based on divisional positions from the previous season. Previously, teams played rotating groups of opponents in the other conference and in other divisions of their own conference, although