NHL Hockey Ops explains modifications to the League rules including time-outs, Coachs Challenge, slashing and face-offs Twitter: . They made a few minor changes today, so lets review. Support The Hockey Guy via Patreon Follow me on Twitter . The Hockey Central panel breaks down the new rule for face offs, which has viewers and some players baffled. The 2017-18 NCAA ice hockey rules and officiating video details the rule changes and points of emphasis for the season.