Vesting of Share Appreciation Rights. Each Share Appreciation Right may, but need not, vest and therefore become exercisable in periodic installments that may, but need not, be equal. The Share Appreciation Right may be subject to all other terms and conditions on the time or times when it may be exercised as the Board may deem appropriate. The vesting provisions of individual Share Appreciation Rights may vary. No Share Appreciation Right may be exercised for a fraction of a Class C Share. The Board may, but is not required to, provide for an acceleration of vesting and exercisability in the terms of any Share Appreciation Right upon the occurrence of a specified event.
