All notices required hereunder shall be given by (i) telephone (confirmed promptly in writing (but not later than the same day for such notice to be deemed given)) or shall be in writing and personally delivered, (ii) sent by facsimile transmission (during business hours) if the sender on the same day sends a confirming copy of such notice by reputable overnight delivery service (charges prepaid), (iii) reputable overnight delivery service (charges prepaid) or (iv) certified United States mail, postage prepaid return receipt requested, and addressed to the respective parties at their addresses set forth on Exhibit B hereto, or at such other address as any party shall hereafter inform the other party by written notice given as aforesaid. All written notices so given shall be deemed effective upon receipt.