This excerpt taken from the ADSK 10-K filed Mar 31, 2005.
Any amendments to the Plan must have the approval of the Board of Directors. Autodesk reserves the right to revise, alter, amend, or terminate the Plan and/or any compensation at any time before, during, or after the applicable Plan Year for any reason. Decisions regarding funding and individual Bonus awards under this Plan are within the sole and exclusive direction of Autodesk. All decisions of Autodesk are final. The Plan does not constitute a contract of employment and does not in any way alter the at-will status of employment at Autodesk.
The Plan shall be applied in compliance with legal requirements, as interpreted and determined by Autodesk in its sole discretion. Accordingly, Autodesk may from time to time waive some of the requirements contained herein or apply the compensation plan differently in some countries as determined by Autodesk.