All notices or other communications required or permitted to be given or made hereunder shall be in writing and delivered personally or sent by pre-paid, first class certified or registered mail, return receipt requested, or by facsimile transmission, to the intended recipient thereof at its address or facsimile number set out below. Any such notice or communication shall be deemed to have been duly given immediately (if given or made in person or by facsimile confirmed by mailing a copy thereof to the recipient in accordance with this Section 11.5 on the date of such facsimile), or five (5) calendar days after mailing (if given or made by mail), and in proving same it shall be sufficient to show that the envelope containing the same was delivered to the delivery service and duly addressed, or that receipt of a facsimile was confirmed by the recipient.