(1)Where a complaint about the conduct of a senior officer—
(a)is submitted to the appropriate authority ; or
(b)is sent to the appropriate authority under section 84(3) above,
it shall be the appropriate authority's duty to record it and, subject to subsection (2) below, to investigate it.
(2)The appropriate authority may deal with the complaint according to the appropriate authority's discretion, if satisfied that the conduct complained of, even if proved, would not justify a criminal or disciplinary charge.
(3)In any other case the appropriate authority shall appoint an officer from the appropriate authority's force or from some other force to investigate the complaint.
(4)A chief officer shall provide an officer to be appointed, if a request is made to him for one to be appointed under subsection (3) above.
(5)No officer may be appointed unless he is of at least the rank of the officer against whom the complaint is made.
(6)Unless an investigation under this section is supervised by the Authority under section 89 below, the investigating officer shall submit his report on it to the appropriate authority.