These regulations are an exercise by the city of its governmental functions for the protection of the public peace, health, and safety and neither the city, the agents and representatives of said city, or any individual, receiver, firm, partnership, corporation, association, or trustee, or any of the agents thereof, in good faith carrying out, complying with, or attempting to comply with, any order, rule, or regulation promulgated pursuant to the provisions of this chapter shall be liable for any damage sustained to persons or property as the result of said activity. Any person owning or controlling real estate or other premises who voluntarily and without compensation grants to the city a license or privilege, or otherwise permits the city to inspect, designate, and use the whole or any part or parts of such real estate or premises for the purpose of sheltering persons during an actual, impending, or practice enemy attack shall, together with his successors in interest, if any, not be civilly liable for the death of, or injury to, any persons on or about such real estate or premises under such license, privilege, or other permission or for loss of or damage to the property of such person.
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