Where the Commissioner is of the opinion that it is in the public interest so to do, he may carry out or continue an investigation initiated by a complaint notwithstanding that the complainant has withdrawn the complaint and, in any such case, the provisions of this Ordinance shall apply to the complaint and the complainant as if the complaint had not been withdrawn.

The Commissioner shall, before carrying out an inspection or, subject to subsection (2), an investigation, by notice in writing served on the relevant data user, inform the data user of his intention to carry out the inspection or investigation, as the case may be.