In the event of a proposed or actual Change in Control, the Company shall require that each outstanding right hereunder be assumed or an equivalent right be substituted by the successor or purchaser corporation unless the Plan is terminated; provided, however, that if any successor or purchaser corporation (or its parent company) does not assume or continue purchase rights granted pursuant to the 423 Component or does not substitute similar rights for such purchase rights, then the accumulated contributions in the Plan Accounts of the Participants in the 423 Component will be used to purchase Common Shares within ten business days prior to the Change in Control, and the purchase rights under the 423 Component will terminate immediately after such purchase.