(a) This chapter is an exercise by the City of its lawful government functions for the protection of the public peace, health, and safety, and neither the City nor its agents and representatives, 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.

(b) Any person owning or controlling real estate or other premises who voluntarily and without compensation grants the City the right to inspect, designate and use the whole or part or parts of such real estate or premises for the purpose of sheltering persons during an actual, impending or practice emergency or enemy attack shall 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. [Code 1979 § 12.02.050.]