To be effective, notices required under this Lease must be in writing and must either be: (a) personally served (deemed received on receipt or refusal of delivery); (b) delivered by a nationally recognized "next business day" express delivery service (deemed received the next business day after posting); (c) posted by certified United States Mail, postage prepaid, return receipt requested (deemed received three business days after posting); or (d) delivered via electronic mail (deemed received on receipt of transmission), provided, however, that if such communication is given via electronic mail, an original counterpart of such communication shall concurrently be sent in either manner specified above. Each document shall be addressed/transmitted as set out in the Lease Term Sheet or at such other address as may from time to time be designated in writing in accordance with this Subsection.