(1) This section shall apply to an investigation carried out by the Director under section 15, 30, 47, 76 or 88(4) and a reference in this section to an investigation is a reference to an investigation to which this section applies.

(2) The Director may, when conducting an investigation -

(a) summon witnesses to attend before him or her,

(b) examine on oath the witnesses attending before him or her,

(c) require any such witness to produce to him or her any document in the power or control of the witness,

(d) by notice in writing, require any person to provide him or her with such written information as the Director considers necessary to enable him or her to carry out his or her functions.

(3) The Director may investigate a complaint even though the person making the complaint may be entitled to bring proceedings in any court with respect to the matter complained of.