All notices required or permitted hereunder shall be in writing and shall be deemed effectively given: (a) upon personal delivery to the party to be notified, (b) when sent by confirmed telex or facsimile or email if sent during normal business hours of the recipient; if not, then on the next Trading Day, (c) five (5) Trading Days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one (1) Trading Day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification of receipt. All communications shall be sent to (a) in the case of the Company, to Rennova Health, Inc., 400 South Australian Ave., 8 th Floor, West Palm Beach, FL 33401 and (b) in the case of the Investors mail to the address listed below on the signature page.