This excerpt taken from the PETM DEF 14A filed May 8, 2006.
15. TERMINATION OR SUSPENSION OF THE PLAN.
(a) The Board may suspend or terminate the Plan at any time. Unless sooner terminated, the Plan shall terminate on December 31, 2011. No Stock Awards may be granted under the Plan while the Plan is suspended or after it is terminated.
(b) Except as provided in subsection 14(c), rights and obligations under any Stock Award granted while the Plan is in effect shall not be impaired by suspension or termination of the Plan, except with the consent of the person to whom the Stock Award was granted.