I didn't see the Canada-Czech game, but this is from the NHL.com rules:
Rule 88(c): A misconduct or game misconduct penalty, at the discretion of the Referee, shall be imposed on a player who throws his stick or any part thereof outside the playing area. If the offense is committed in protest of an Official's decision, a minor penalty for unsportsmanlike conduct plus a game misconduct penalty shall be assessed to the offending player.
That's the closest thing I could find to it, however that is NHL rules and they may be different for the tournament.