Arizona Revised Statutes Title 12. Courts and Civil Proceedings § 12-982. Qualified immunity;  insurance coverage

A. A volunteer is immune from civil liability in any action based on an act or omission of a volunteer resulting in damage or injury if:

B. Notwithstanding subsection A of this section, in any suit against a nonprofit corporation or nonprofit organization, hospital or governmental entity for civil damages based on the negligent act or omission of a volunteer, proof that the act or omission was within the scope of the volunteer's official functions and duties is sufficient to establish the vicarious liability, if any, of the organization.

C. A motor vehicle liability policy, as defined in § 28-4001, which provides coverage to the operator of a motor vehicle is subject to the following provisions which need not be contained in the policy.  The liability of the insurance carrier with respect to the insured and any other person using the vehicle with the express or implied permission of the insured shall extend to provide excess coverage for a nonprofit corporation or nonprofit organization for the acts of the operator in operating a motor vehicle at all times when the operator is acting as a volunteer for that nonprofit corporation or nonprofit organization.