Four step

Icing occur when a player shoots the puck crosswise both the center line and the differing team's goal line without the puck going from beginning to end the goal crease. When icing occurs, a linesman stops play if a defending player (other than the goaltender) crosses the unreal line that connects the two face off dots in their distrustful zone before an attacking player is able to. Play is resumed with a face off in the defending zone of the team that committed the infraction. Icing is not enforced for a team that is short-handed. If the goaltender makes a move from his net to play the puck, the icing is immediately waved off (in contrast to minor confederation and international hockey, where the goaltender must play the puck for it to be waved off). Icing can also be waved off if, in the officials' opinion, the defending team had a workable opportunity to play the puck before crossing the goal line. After an icing, a TV timeout cannot be called.Following the 2004–2005 lockout, the icing rule insists that the team in abuse of icing the puck is not permitted to make any line changes before the following faceoff. The Trushinski bylaw says players who are blind in one or both eyes are ineligible to play. The rule is named for Frank Trushinski, a minor confederation hockey player for the Kitchener Green shirts. Trushinski lost his sight in one eye in a pastime in 1921, but was allowed to keep on playing. In a later game, he suffered a skull fracture which cost him most of the sight in his other eye. A penalty is a punishment for infractions of the rules. A referee makes most penalty calls while the linesmen may call only obvious technical infractions such as too many men on the ice. In the NHL, the linesmen may also stop play due to player injury, and may report to the referees during any stoppage in play, any circumstances pertaining to major, match, or bad behavior penalties, abuse of officials (physical or otherwise), unsportsmanlike conduct, or double-minor penalty for high-sticking causing wrong, that were not detected by the referees.