(a) summon and enforce the attendance of any person and examine him; (b) require the discovery and production of any document; and (c) requisition any public record or copy thereof from any office. (3) The provisions of section 15 shall apply in relation to any statement made by a person before any officer or agency whose services are utilized under subsection (1) as they apply in relation to any statement made by a person in the course of giving evidence before the Commission. (4) The officer or agency whose services are utilized under sub-section (1) shall investigate into any matter pertaining to the inquiry and submit a report thereon to the Commission within such period as may be specified by the Commission in this behalf. (5) The Commission shall satisfy itself about the correctness of the fact stated and the conclusion, any, arrived at in the report submitted to it under sub section (4) and for this purpose the Commission may make such inquiry (including the examination of the person or persons who conducted or assisted in the investigation) as it thinks fit. Sec- 15. Statement made by persons to the Commission No statement made by a person in the course of giving evidence before the Commission shall subject him to, or be used against him, in any civil or criminal proceedings, except a prosecution for giving false evidence by such statement: Provided that the Statement: (a) Is made in reply to the question which he is required by the Commission to answer; or (b) Is relevant to the subject-matter of the inquiry. Sec- 16. Persons likely to be prejudicially affected to be heard If at any stage of the inquiry, the Commission:— (a) Consider it necessary to inquiry into the conduct of any person; or (b) Is of the opinion that the reputation of any persons is likely to be prejudicially affected by the inquiry, It shall give to that person a reasonable opportunity of being heard in the inquiry and to produce evidence in his defence: Provided that nothing in this section shall apply where the credit of a witness is being impeached. 76