No person shall be granted an exclusive right to conduct any commercial aeronautical activity upon the airport; provided, however, that no person shall be permitted to use any land or conduct any commercial aeronautical activity or the solicitation of business in connection therewith unless such aeronautical activity is conducted in accordance with the standards herein established and as hereinafter amended from time to time by the Airport Board and the issuance of the proper permits, licenses, or unless the person has a valid contract or agreement to conduct such activities with Pullman and Moscow. (Ord. B-120 §3, 1973).