Discharge of the chief constable’s functions by the appropriate officer

36.  The functions of the chief constable under regulations 6(1), 10(2)(a), 16(1) and 27(3) may be discharged by the appropriate officer if the appropriate officer—

(a) has not acted as investigating officer in the case, or

(b) where the case is one that the chief constable considered appropriate for informal resolution, has not been appointed by the chief constable to resolve the case informally.