BOCA RATON, Fla. (CBSNewYork/AP) — Major changes could be on the way.

Three-on-three overtime is getting a nod from NHL general managers, although a format decision and final approval are still needed.

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GMs agreed Tuesday to recommend some type of three-on-three beginning next season. But they are still debating whether to add time to the extra session or begin overtime three-on-three instead of four-on-four.

The recommendations will go to the joint NHL/NHLPA competition committee, which meets in June and must approve any rule changes.

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That committee also will consider the other recommendation from general managers of instituting a coach’s challenge system for goaltender interference.

If it goes through, coaches will be able to challenge goalie interference only on goals scored and only if they have their timeout left.

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