This letter agreement may not be modified or amended unless in writing signed by the undersigned parties. Any notice required hereunder shall be made in writing, as applicable, to the Company in care of the Global Head of Human Capital at her principal office location or to you at your home address most recently on file with the Company. Except for an assignment by the Company of this letter agreement to an Affiliate, this letter agreement may not be assigned by the parties other than as expressly provided herein. This letter agreement may be executed through the use of separate signature pages or in any number of counterparts, with the same effect as if the parties executing such counterparts had executed one counterpart.