This excerpt taken from the USB DEF 14A filed Mar 5, 2007.
(a) Amendments to the Plan. The Board may amend, alter, suspend, discontinue or terminate the Plan at any time; provided, however, that, notwithstanding any other provision of the Plan or any Award Agreement, prior approval of the stockholders of the Company shall be required for any amendment to the Plan that:
(i) requires stockholder approval under the rules or regulations of the Securities and Exchange Commission, the New York Stock Exchange or any other securities exchange that are applicable to the Company;
(ii) increases the number of shares authorized under the Plan as specified in Section 4(a) of the Plan;
(iii) increases the number of shares subject to the limitations contained in Section 4(d) of the Plan;
(iv) permits repricing of Options or Stock Appreciation Rights, which is prohibited by Section 3(a)(v) of the Plan;
(v) permits the award of Options or Stock Appreciation Rights at a price less than 100% of the Fair Market Value of a Share on the date of grant of such Option or Stock Appreciation Right, contrary to the provisions of Sections 6(a)(i) and 6(b)(ii) of the Plan; or
(vi) would cause Section 162(m) to become unavailable with respect to the Plan.
(b) Amendments to Awards. Subject to the provisions of the Plan, the Committee may waive any conditions of or rights of the Company under any outstanding Award, prospectively or retroactively. Except as otherwise provided in the Plan, the Committee may amend, alter, suspend, discontinue or terminate any outstanding Award, prospectively or retroactively, but no such action may adversely affect the rights of the holder of such Award without the consent of the Participant or holder or beneficiary thereof. The Company intends that Awards under the Plan shall satisfy the requirements of Section 409A to avoid any adverse tax results thereunder, and the Committee shall administer and interpret the Plan and all Award Agreements in a manner consistent with that intent. If any provision of the Plan or an Award Agreement would result in adverse tax consequences under Section 409A, the Committee may amend that provision (or take any other action reasonably necessary) to avoid any adverse tax results and no action taken to comply with Section 409A shall be deemed to impair or otherwise adversely affect the rights of any holder of an Award or beneficiary thereof.
(c) Correction of Defects, Omissions and Inconsistencies. The Committee may correct any defect, supply any omission or reconcile any inconsistency in the Plan or in any Award or Award Agreement in the manner and to the extent it shall deem desirable to implement or maintain the effectiveness of the Plan.