A county, city, county public hospital, merged area hospital, memorial hospital or school corporation governing body may delegate its investment authority, under the provisions of this chapter , to the treasurer or other financial officer of the governmental unit, who shall thereafter be responsible for handling investment transactions until such delegation of authority is revoked. [C66, 71, 73, 75, 77, 79, 81, §453.11 ] C93, §12C.11