(4) The Commissioner shall be assisted by such public officers as may be necessary. (5) Every public officer referred to in subsection (4) shall be under the administrative control of the Commissioner. 5. Functions of Commissioner The Commissioner shall (a) ensure compliance with this Act, and any regulations made under the Act; (b) issue or approve codes of practice or guidelines for the purposes of this Act; (c) create and maintain a register of all data controllers and data processors Amended by [Act No. 1 of 2009] (d) exercise control on all data processing activities, either of its own motion or at the request of a data subject, and verify whether the processing of data is in accordance of this Act or regulations made under the Act; (e) promote self-regulation among data controllers and data processors; (f) investigate any complaint or information which give rise to a suspicion that an offence, under this Act may have been, is being or is about to be committed; (g) take such measures as may be necessary so as to bring to the knowledge of the general public the provisions of this Act; (h) undertake research into, and monitor developments in, data processing, including data-matching, data linkage and information and communication