Any notice required or permitted to be given under this Agreement shall be in writing, shall specifically refer to this Agreement and shall be deemed to have been sufficiently given for all purposes if delivered by (a) first class certified or registered mail, postage prepaid, (b) international express delivery service or (c) personally, or if sent by facsimile and confirmed by electronic transmission. Unless otherwise specified in writing, the mailing addresses of the Parties shall be as described below.