No aircraft shall be left unattended unless properly secured to the ground by ropes or other appropriate means, or in a hangar, with hangar doors securely closed. All aircraft stored in tie-down areas, hangars or in transient tie-down areas shall be maintained in a safe orderly manner. To insure the ability to move aircraft in cases of emergency all aircraft tires and landing gear shall be maintained in a fully inflated and operable condition. (I) (Ord. 3051 § 1, 1986)