There will be multiple changes to the coach's challenge, most notably adding a third category to allow coaches to challenge missed stoppages of play in the offensive zone that lead to goals. They already were permitted to challenge for goalie interference and offside.
Under the new category, coaches will be able to challenge plays that may involve pucks that hit off the protective spectator netting, pucks that are illegally high-sticked to a teammate in the offensive zone, pucks that have gone out of play but are subsequently touched in the offensive zone, and hand passes.
The time between when the event that should have resulted in a stoppage happened and when the goal was scored does not matter as long as the puck stays in the attacking zone.
"We're not talking about discretionary calls, we're not talking about missed penalties," NHL Deputy Commissioner Bill Daly said. "It's really just black-and-white calls that video can conclusively determine that there was a missed stoppage and it resulted in a goal."
Coach's challenges no longer will be limited based on the availability of a timeout, but a minor penalty for delay of game will be assessed for any failed challenge under any of the three categories. Any subsequent failed challenge will result in a double minor for delay of game.
Under the old rules, a minor penalty for delay of game was assessed only for a failed challenge for offside.