The Stock Appreciation Right Agreement shall state when the Stock Appreciation Right becomes exercisable ( i.e. , “vests”) and, if applicable in the Administrator’s discretion, shall describe the Performance Objectives and Performance Period upon which vesting is based, the manner in which performance shall be measured and the extent to which partial achievement of the Performance Objectives may result in vesting of the Stock Appreciation Right. The Participant may exercise the Stock Appreciation Right, in full or in part, upon or after the vesting date of such Stock Appreciation Right (or portion thereof); provided , however , that the Participant may not exercise a Stock Appreciation Right after the maximum term of such Stock Appreciation Right, as such term is specified in the Stock Appreciation Right Agreement. Unless otherwise determined by the Administrator and specified in the Agreement governing the Award, no Stock Appreciation Right shall be exercisable during a term of more than ten (10) years after the date on which it is granted.