All notices, requests, demands and other communications hereunder shall be in writing and shall be delivered by hand, sent prepaid for next-day delivery by Federal Express (or a comparable overnight delivery service) or sent by the United States mail, certified, postage prepaid, return receipt requested, at the addresses and with such copies as designated below. Any notice, request, demand or other communication delivered or sent in the manner aforesaid may be given by the party required to give such notice, etc., or its attorney, and shall be deemed given or made (as the case may be) when actually delivered to or refused by the intended recipient.