Any notices to be given under this Agreement may be effected by personal delivery in writing or by mail, registered or certified, postage prepaid with return receipt requested. Mailed notices shall be addressed to the parties at the addresses appearing on the first page of this Agreement (to the attention of the Secretary in the case of notices to the Company), but each party may change the delivery address by written notice in accordance with this Section 6.3. Notices delivered personally shall be deemed communicated as of actual receipt; mailed notices shall be deemed communicated as of the second day following deposit in the United States Mail.