Amendment and Waiver. Neither this Award Agreement nor any provision hereof may be amended, modified, changed, discharged, terminated or waived orally, by any course of dealing or purported course of dealing or by any other means except # in the case of an amendment, modification, change or waiver that does not impair the rights of the Participant with respect to outstanding Restricted Units or that is deemed by the Committee to be advisable to avoid the imposition of any tax under Section 409A of the Code, by written notice to the Participant or # an agreement in writing signed by the Company and the Participant. No such written notice of agreement shall extend to or affect any provision of this Award Agreement not expressly amended, modified, changed, discharged, terminated or waived or impair any right consequent on such a provision. The waiver of or failure to enforce any breach of this Award Agreement shall not be deemed to be a waiver of or acquiescence in any other breach hereof.