(1) The Commission, on receipt under section 139(2) of an investigation report, shall, for the purposes of the inquiry concerned, consider the report and any submissions annexed to it.
(2) Where the Commission, in considering the documents referred to in subsection (1), forms the view that further information is required for the purpose of enabling it to make a decision under section 111, 112, 124 or 125, or a draft decision under section 113, as the case may be, it may, as it considers appropriate, do one or more than one of the following:
(a) conduct an oral hearing;
(b) give the controller or processor to which the investigation concerned relates -
(i) a copy of the investigation report, and
(ii) a notice in writing stating that the controller or processor concerned may, within 21 days from the date on which the notice was served on it (or such further period not exceeding 21 days as the Commission allows), make submissions in writing to the Commission in relation to such matters as
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