PHOENIX — Coaches throwing challenge flags and referees sticking their heads in hoods will remain NFL fixtures. Forever.

On Tuesday, instant replay as an officiating tool became a permanent part of pro football.

"Instant replay is an accepted part of the game. It's what we are," said Atlanta Falcons general manager Rich McKay, co-chairman of the competition committee that recommended the change. "There was not really much discussion about it."

League owners voted 30-2, with Cincinnati and Arizona dissenting. All but three stadiums will be equipped with high-definition equipment and will be recabled before the upcoming season, at a cost of as much as $300,000 per club. The stadiums being replaced in Irving, Texas, Indianapolis and East Rutherford, N.J., will not get the updates.

McKay, once a staunch opponent of replay, has gone full circle, as have most owners.

"People like myself, I was an opponent of the old system, when the eye in the sky decided which play to review," he said. "As the system was enhanced, with a limited system of challenges, a lot more became comfortable with how it operates. It's not too obtrusive with our game and it does not slow down games.

"I think coaches are more comfortable with it. They were hesitant with the challenge system, and I think they've become more comfortable."

With replay out of the way, another controversial topic — overtime — will be addressed today. In part, at least.

McKay was not optimistic that the recommendation to move the kickoff for overtime from the 30-yard line to the 35 would pass. He said some people were concerned about the effect on the return game, and that a group of owners would favor a mandatory two-possession overtime in which each team gets the ball once.

That has not been proposed, however. Nor has any system similar to the college overtimes, or a continuation of the game from where it ended after four quarters.