If the required knowledge or skill for a disaster function is not available within the city government, the city manager is authorized to seek assistance from persons outside of the city government. If a person outside of city government is assigned duties of a supervisory nature, that person shall have the authority to perform such duties prior to, during, and after the occurrence of a disaster, until authorization is withdrawn. Services from persons outside of government may be accepted by the city on a volunteer basis. These citizens shall be enrolled as emergency management volunteers in cooperation with the chief administrative officers of departments or offices affected. (Ord. Nos. 15983; 17226; 25834)