This excerpt taken from the NS 10-K filed Feb 27, 2009.
AMENDMENT AND/OR TERMINATION OF PLAN
9.1 Amendment or Termination of the Plan. The Company reserves the right in its sole discretion, to suspend, amend or terminate this Plan at any time or from time to time, in whole or in part for whatever reason it deems appropriate.
9.2 No Retroactive Effect on Benefits. No amendment will affect the rights of any Participant to the Retirement benefit provided in Article IV previously accrued by the Participant or will change a Participants rights under any provision relating to a Change in Control after a Change in Control has occurred without his consent. However, the Board of Directors retains the right at any time to change in any manner the Retirement benefit provided in Article IV but only as to accruals after the date of the amendment.
9.3 Effect of Termination. If this Plan is terminated, then (i) no further Retirement benefit will accrue, and (ii) all Plan Participants in active employment of a Company (including Participants whose Accrued Benefit is frozen pursuant to Section 2.2) shall become fully vested. In the event of the termination of the Plan, the Accrued Benefit payable to each affected current or frozen Participant (or Surviving Spouse) shall be determined as of such date of termination and shall be paid at such time and in such form as it would be otherwise payable under the terms of the Plan.
9.4 Effect of Change in Control. Upon a Change in Control, the benefits of all Participants hereunder shall immediately become fully vested. Additionally, the Committee may, within the period beginning thirty (30) days prior to the effective date of the Change in Control, and ending twelve (12) months after the effective date of the Change in Control, make an irrevocable decision to terminate the Plan (and all deferred compensation plans maintained by the Company which must be aggregated with the Plan under Code Section 409A) and distribute all benefits to Participants. In the event of such termination following a Change in Control, the accrued benefits of each Participant (determined as of the date of Plan termination and calculated in the manner provided for in this Plan) shall be distributed in the form of a lump sum payment within twelve (12) months following the termination of this Plan. In the absence of such Plan termination, a Change in Control shall not alter the time and manner of the payment of benefits hereunder, and all benefits shall be paid at the time and in the manner as they would otherwise be paid in accordance with the provisions of this Plan.