This excerpt taken from the UAUA 8-K filed Feb 1, 2006.
(iii) Each Qualified Director is eligible to receive Periodic Awards pursuant to Section 5(c).
(b) Ceasing to be Eligible. An individual who ceases to be a Qualified Director is not eligible to receive any subsequent Periodic Awards pursuant to Section 5(c) or to make any subsequent elections or receive further credits pursuant to Section 6, other than such credits relating to the period prior to such cessation and, if applicable, earnings credits under Section 6.
(c) Condition of Participation. Each Participant, as a condition of participation in the DEIP, is bound by all the terms and conditions of the DEIP and the Plan Rules, including but not limited to the reserved right of the Company to amend or terminate the DEIP, and must furnish to the Committee such pertinent information, and execute such election forms and other instruments, as the Committee or Plan Rules may require by such dates as the Committee or Plan Rules may establish.
(d) Termination of Participation. An individual will cease to be a Participant as of the date on which he or she is no longer a Qualified Director and his or her outstanding Periodic Awards have been exercised, cancelled, vested or expired and his or her entire Account balances have been distributed.