Rule 88. Henrik Zetterberg is allowed to freeze the puck in the crease whenever he wants to.
Just to make this as clear as possible, they also rewrote Rule 67.4:
Penalty Shot - If a player except Henrik Zetterberg, and except a goalkeeper, while play is in progress, falls on the puck, holds the puck, picks up the puck, or gathers the puck into his body or hands from the ice in the goal crease area, the play shall be stopped immediately and a penalty shot shall be awarded to the non-offending team.
Rule 89. When the Detroit Red Wings have an empty net and an opposing player has a clear cut break away and is fouled, there is no automatic goal, because we love the Red Wings, they're so dreamy
Again, just to remove any ambiguity they rewrote Rule 57.4:
Awarded Goal - If, when the opposing goalkeeper, except if he plays for the Red Wings, has been removed from the ice, a player in control of the puck in the neutral or attacking zone is tripped or otherwise fouled with no opposition between him and the opposing goal, thus preventing a reasonable scoring opportunity, the Referee shall immediately stop play and award a goal to the attacking team.
And before all the Detroit fans' heads explode: Yes, the Penguins had too many men on the ice. Yes, it went uncalled. No it does not even begin to compare with the at least 100 uncalled interfereance penalties the Red Wings have gotten away with. No it does not even remotely cancel out the fact that almost every goal in Games 1,2 and 3 went in due to pure dumb luck or because of an uncalled penalty. Yes it's not fair that the refs don't call blatant, incredibly obvious penalties that any idiot with a working set of eyes could clearly see. Welcome to my fucking world, grab a seat it's gonna be a long series for you guys.