All notices and other communications under this Agreement shall be properly given only if made in writing and mailed by certified mail, return receipt requested, postage prepaid, or delivered by hand (including messenger or recognized delivery, courier or air express service) to the party at the address set forth in this section 9.1 or such other address as such party may designate by notice to the other party. Such notices and other communications shall be effective on the date of receipt (evidenced by the certified mail receipt) if mailed or on the date of such hand delivery if hand delivered. If any such notice or other communication is not received or cannot be delivered due to a change in the address of the receiving party of which notice was not previously given to the sending party or due to a refusal to accept by the receiving party, such notice or other communication shall be effective on the date delivery is attempted. Any notice or other communication under this Agreement may be given on behalf of a party by the attorney for such party.