Every notice or other communication relating to this Agreement shall be in writing, and shall be mailed to or delivered to the party for whom it is intended at such address as may from time to time be designated in a notice mailed or delivered to the other party as provided herein; provided that, unless and until some other address be so designated, all notices or communications by the Grantee to the Company shall be mailed or delivered to the Company at its Tulsa, Oklahoma, office and all notices or communications by the Company to the Grantee may be given to the Grantee personally or mailed to the Grantee’s home address as reflected on the books of the Company.