The privilege of using the airport and its facilities shall be conditioned upon the assumption of full responsibility and risk by the user thereof, and he or she shall release, hold harmless and indemnify the city, its officials and employees, from any liability or loss resulting from such use, as well as against claims of third persons, as against those of the person so using the airport. The exercise of the privilege of use shall constitute an acknowledgment that the city maintains such airport in a governmental capacity. (Prior code § 4.02.036)