(a)  For purposes of this Agreement, all notices and other communications required or permitted hereunder shall be in writing and shall be deemed to have been duly given when delivered or five days after deposit in the United States mail, certified and return receipt requested, postage prepaid, addressed (1) if to the Employee, to the Employee's address of record with the Company, and if to the Company, to Madison Gas and Electric Company, P. O. Box 1231,  Madison, WI 53701-1231, attention Mr. Gary J. Wolter, or (2) to such other address as either party may have furnished to the other in writing in accordance herewith, except that notices of change of address shall be effective only upon receipt.