"Full playing strength will be 4-on-4 until the first whistle following three minutes of play (4:00 remaining), at which time full strength will be reduced to 3-on-3 for the duration of the overtime period.
If the game is still tied following overtime, a winner will be determined by a three-player shootout."
See http://www.thehockeynews.com/blog/ah...daily_20140711 for details.