the Commissioner has completed an investigation (and whether or not the investigation was initiated by a complaint);

the result of the investigation is that the act or practice the subject of the investigation is not a contravention of a requirement under this Ordinance because of an exemption under Part VIII; and

the interest protected by that exemption would be likely to be prejudiced if sections 47 and 48 applied in relation to the investigation, then-

1. those sections shall not apply in relation to the investigation; and
2. the Commissioner shall, in such manner and at such time as he thinks fit-
   
   (A) inform the relevant data user of the result of the investigation and such other comments arising from the investigation as he thinks fit;
   
   (B) if the investigation was initiated by a complaint, inform the complainant that the result of the investigation is that he is satisfied that the act or practice the subject of the investigation is not a contravention of a requirement under this Ordinance (or words to the like effect).