This excerpt taken from the SMG 10-Q filed May 6, 2009.
YOU MAY FORFEIT YOUR DSUs IF YOU TERMINATE. Except as otherwise provided in this Section 3(a) and Section 3(b), you will forfeit your DSUs if you Terminate prior to the Vesting Date:
(i) If you Terminate for Cause (as defined below) prior to the Vesting Date, your DSUs will be forfeited immediately. For purposes of this Award Agreement, “Cause” means your conviction of, or plea of guilty or nolo contendere to, a felony.