This excerpt taken from the GWW 10-Q filed Aug 2, 2006.
10.6 Transferability of Cash-Based and Other Stock-Based Awards. Except as otherwise determined by the Committee, neither Cash-Based Awards nor Other Stock-Based Awards may be sold, transferred, pledged, assigned, or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution. Further, except as otherwise provided by the Committee, a Participants rights under this Plan, if exercisable, shall be exercisable during his lifetime only by such Participant. With respect to those Cash-Based Awards or Other Stock-Based Awards, if any, that are permitted to be transferred to another individual, references in this Plan to exercise or payment of such Awards by or to the Participant shall be deemed to include, as determined by the Committee, the Participants permitted transferee.