The Commissioner has the general functions of—
(a)securing the maintenance by the Commissioner, and by each of the relevant authorities, of suitable arrangements for the handling of relevant complaints;
(b)keeping under review all arrangements maintained for that matter;
(c)securing that arrangements maintained for that matter—
(i)are efficient and effective;
(ii)contain and manifest an appropriate degree of independence; and
(iii)are adhered to;
(d)making such recommendations, and giving such advice, for the modification of—
(i)the arrangements maintained for that matter; and
(ii)the practice of relevant authorities in relation to other matters,
as appear from the carrying out of the Commissioner’s other functions, to be necessary or desirable.