All notices and other communications must be in writing, addressed to the representatives described below and delivered by hand, recognized overnight courier service, registered mail or electronic mail in .pdf format. Notices will be deemed received as follows: (a) if delivered by hand or overnight service, then on the date of delivery, (b) if by registered mail, then on the fifth (5 th ) calendar day following posting or (c) if by electronic mail, then upon receipt with telephone confirmation thereof by the receiving Party to the sending Party. Any Party may change its designated representatives at any time by notifying the other Parties in writing.