Any notice, instruction, authorization, request or demand required hereunder shall be in writing, and shall be delivered either by personal delivery, by telegram, telex, telecopy or similar facsimile means, by certified or registered mail, return receipt requested, by facsimile transmission or by courier or delivery service, to the Company at 10713 West Sam Houston Parkway N., Suite 800, Houston, Texas 77064, Attention: Chief Financial Officer, facsimile number (281) 765-7175, and to the Recipient at the Recipient’s address and facsimile number (if applicable) indicated beneath the Recipient’s signature on the execution page of this Agreement, or at such other address and facsimile number as a party shall have previously designated by written notice given to the other party in the manner hereinabove set forth. Notices shall be deemed given when received, if sent by facsimile means (confirmation of such receipt by confirmed facsimile transmission being deemed receipt of communications sent by facsimile means); and when delivered (or upon the date of attempted delivery where delivery is refused), if hand-delivered, sent by express courier or delivery service, or sent by certified or registered mail, return receipt requested.