For purposes of this article, unless a different meaning plainly is required:
(1) "Managerial function" means the act or acts of a qualified director, whereby such qualified director, through direction, regulation or administration, exercises government, control, or superintendence of the affairs of a volunteer organization or entity. Managerial functions shall include ministerial acts and acts involving the exercise of discretion and judgment, but shall not include the physical or manual handling or use of tangible property, including, but not limited to, motor vehicles, or the direct guidance or supervision of persons.