All notices and other communications given or made pursuant hereto shall be in writing and shall be deemed to have been given or made if in writing and delivered personally or 7 days after being sent by registered or certified mail (postage prepaid, return receipt requested) to the parties at the addresses set forth in the Preamble of this Agreement, or to such other persons or at such other addresses as shall be furnished by any party by like notice to the others, and such notice or communication shall be deemed to have been given or made as of the date so delivered or mailed. No change in any of such addresses shall be effective insofar as notices under this Section 9.3 are concerned unless notice of such change shall have been given to such other party hereto as provided in this Section 9.3.