Any notice or other document required or permitted to be given or delivered to the Holder hereof shall be in writing and delivered at, or sent by certified or registered mail or by facsimile to such Holder at, the last address shown on the books of the Company maintained at the Warrant Office for the registration of this Warrant or at any more recent address of which the Holder hereof shall have notified the Company in writing. Any notice or other document required or permitted to be given or delivered to the Company, other than such notice or documents required to be delivered to the Warrant Office, shall be delivered at, or sent by certified or registered mail or by facsimile to, the Warrant Office.