Emergency Response:

30.800-2

No person may maintain an action for damages for injury, death or loss that results from acts or omissions of a person while rendering emergency medical assistance unless it is alleged and proved by the complaining party that the person was grossly negligent in rendering the emergency medical assistance.

Automatic External Defibrillator:

30.802-2

A person may not bring a cause of action against another person for damages for injury, death or loss that result from acts or omissions involving the use, attempted use or nonuse of an automated external defibrillator when the other person: (a) Used or attempted to use an automated external defibrillator; (b) Was present when an automated external defibrillator was used or should have been used; (c) Provided training in the use of an automated external defibrillator; (d) Is a physician and provided services related to the placement or use of an automated external defibrillator; or (e) Possesses or controls one or more automated external defibrillators placed in a public setting and reasonably complied with the following requirements:

(A) Maintained, inspected and serviced the automated external defibrillator, the battery for the automated external defibrillator and the electrodes for the automated external defibrillator in accordance with guidelines set forth by the manufacturer.
(B) Ensured that a sufficient number of employees received training in the use of an automated external defibrillator so that at least one trained employee may be reasonably expected to be present at the public setting during regular business hours.
(C) Stored the automated external defibrillator in a location from which the automated external defibrillator can be quickly retrieved during regular business hours.
(D) Clearly indicated the presence and location of each automated external defibrillator.
(E) Established a policy to call 9-1-1 to activate the emergency medical services system as soon as practicable after the potential need for the automated external defibrillator is recognized.
https://www.oregonlaws.org/ors/30.800
https://www.oregonlaws.org/ors/30.802