Any notice to be given hereunder by either party to the other 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 set forth below, but each party may change his, her or its address by written notice in accordance with this Section 23. Notices shall be deemed communicated as of the actual receipt or refusal of receipt.