The park board shall have the authority to appoint and employ a city forester and such other officers, assistants and laborers as it may deem necessary for the efficient administration of the duties prescribed by this chapter. No person shall be appointed to the office of city forester unless such person, at the date of his appointment, has satisfied the park board that he possesses at least four years of practical experience in regular forest service, two of which shall have been in city forestry, and also that he has a thorough knowledge of soils, insects and plant diseases as they affect trees and their growth. The park board shall have the power to establish such rules and regulations as it shall deem necessary for the conduct of the city forester and for the administration of this chapter. (Code 1941, Art. 147-2; Ord. 8020)