(1) An investigator may require any person within subsection (2) -
(a) to attend before the investigator at a specified time and place and answer questions, or
(b) otherwise to provide any information which the investigator requires.
(2) The persons referred to in subsection (1) are -
(a) the person who is the subject of the investigation ("the person under investigation");
(b) any person connected with the person under investigation;
(c) in the case of an investigation into whether there has been a compliance failure, any person who in the investigator's opinion is or may be able to give information which is or may be relevant to the investigation.
(3) An investigator may also require any person to produce at a specified time and place any specified documents or documents of a specified description.
(4) A requirement under subsection (1) or (3) may be imposed only so far as the investigator concerned reasonably considers the question, provision of information or production of the docu
…