This excerpt taken from the SONE DEF 14A filed Apr 16, 2008.
10.2. Other Terms.
The Board shall determine at the date of grant or thereafter, the time or times at which and the circumstances under which a SAR may be exercised in whole or in part (including based on achievement of performance goals and/or future service requirements), the time or times at which SARs shall cease to be or become exercisable following termination of Service or upon other conditions, the method of exercise, method of settlement, form of consideration payable in settlement, method by or forms in which Stock will be delivered or deemed to be delivered to Grantees, whether or not a SAR shall be in tandem or in combination with any other Award, and any other terms and conditions of any SAR. Notwithstanding any other provision in this Plan, no SAR will have a term longer than ten (10) years from the date of grant.