statement of the agreement between the parties. No change or modification of this Agreement shall be valid unless the same be in writing and signed by the parties. 15. This Agreement shall not be assigned by the Distributor without the prior written consent of the Principal. 16. Official communication from Distributor or the Principal shall be in written form or by email, acknowledged by the recipient. 17. This Agreement shall be construed in accordance with and governed by the laws of the State of Texas without regard to principles of conflicts of laws. 18. Each of Principal and Distributor represents that it has the right to enter into this Agreement and that this Agreement does not violate any agreement to which it is a party. Principal represents that it owns or has rights to the intellectual property embodied in the Products. Intending to be legally bound, the parties hereto have caused this Agreement to be executed as of the date first above written. BY /s/ Cameron Gundry BY /s/ Justin Anderson Cameron Gundry, Dir. of Commercialization Justin Anderson, CEO Co-Diagnostics, Inc. PreCheck Health Services, Inc. (Principal) (Distributor) Source: PRECHECK HEALTH SERVICES, INC., 8-K, 3/20/2020 .EXHIBIT A LIST OF PRODUCTS Source: PRECHECK HEALTH SERVICES, INC., 8-K, 3/20/2020 Source: PRECHECK HEALTH SERVICES, INC., 8-K, 3/20/2020 Source: PRECHECK HEALTH SERVICES, INC., 8-K, 3/20/2020