Except as provided in Sections 3 or 4 below, if the Participant incurs a Disability (as such term is defined in the Plan), then all unvested Shares subject to the Option shall immediately become vested and exercisable. Except as provided in Section 2(d)(iv)(B) below, the right to exercise the vested portion of the Option will continue until the earlier of the last day of the sixty (60) month period following the last date of Participant's active employment or the Expiration Date.