All notices required or permitted under this Agreement shall be in writing and shall be deemed effective upon (a) the date of receipt, if sent by personal delivery (including delivery by reputable overnight courier), or (b) the date of receipt or refusal, if deposited in the United States Post Office, by registered or certified mail, postage prepaid and return receipt requested, or (c) the date of receipt if sent by e-mail PDF or facsimile transmission to the e-mail address or facsimile number of record of Executive or the Company, or at such other place as may from time to time be designated by either party in writing.