from Dan Rosen of NHL.com,

A change to the overtime format and the expansion of video replay to include a coach's challenge were approved by the NHL Board of Governors on Wednesday.

The change in overtime will see the League go to a 3-on-3 format for a five-minute period in regular-season games tied at the end of regulation. Previously, the League played 4-on-4 overtime. Regular-season games tied at the end of overtime will continue to be decided by a shootout.

The coach's challenge will be limited to goals scored on potential offside or goalie-interference plays.

The Board also approved a change to faceoff procedures that will have the defensive player place his stick on the ice first in all faceoffs not held at the center-ice dot. In the past, the visiting team player had to declare first; under the new rule, the only time the visiting player must declare first will be on center-ice faceoffs.

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