The Undertaker and Triple H have both been fined an undisclosed amount by WWE, due to them using a chair shot to the head spot at WrestleMania. Chair shots to the head are against company policy.
UPDATE: Here is the official blurb from the corporate website…
Superstars Fined for Chair Shot
Pursuant to WWE’s Concussion policy, the stunt of using a folded metal chair shot to the head is prohibited. Triple H and The Undertaker have both been fined for violating this policy at WrestleMania XXVII. WWE penalizes through fine and/or suspension for violation of this policy, which is unchanged and still in effect.
How Much Were Triple H & The Undertaker *FINED* By WWE?, DETAILS HERE [>>]!