NHL commissioner Gary Bettman confirmed a series of rule changes for the 2019-20 season. The alterations were approved by the league's Board of Governors, general managers, and competition committee.

The most prominent changes pertain to video reviews, which underwent significant modifications after several controversial calls throughout the Stanley Cup Playoffs.

Here's a look at the entire list of changes, per the NHL:

New category: In addition to coach’s challenge for “offside” and “interference on the goalkeeper,” a third category will allow for the coach’s challenge of goal calls on the ice that follow plays in the offensive zone that should have resulted in a play stoppage, but did not. This change will allow challenges of plays that may involve pucks that hit the spectator netting, pucks that are 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 that precede without a play stoppage and ultimately conclude in the scoring of a goal. Plays that entail “discretionary stoppages” (e.g. penalty calls) will not be subject to a coach’s challenge.

Penalties for unsuccessful challenges: The number of coach’s challenges that can be made will no longer be limited based on the availability of a team’s timeout. Teams will be permitted to exercise a coach’s challenge at any time, but with escalating “consequences” for unsuccessful challenges. The consequences of unsuccessful coach’s challenges will be made consistent across all three categories of coach’s challenges: (1) minor penalty for delaying the game on a club’s first unsuccessful coach’s challenge; and (2) double-minor penalty for delaying the game for each additional coach’s challenge that is unsuccessful. The Situation Room in Toronto will continue to be responsible for initiating video review in the final minute of regulation time and overtime as well as continue to have final authority over all coach’s challenge video review decisions with input and consultation from both the on-ice officials and a former official staffed in the Situation Room.