(2) Any liability resulting from an act or omission that would but for subsection (1) attach to a director of the board of an ambulance service attaches instead to the ambulance service. 22A Validity of acts or decisions An act or decision of the board of an ambulance service is not invalid by reason only of— (a) a defect or irregularity in or in connection with the appointment of a director of the board; or (b) a vacancy in the directorship of the board