(a) The Ombudsman may, for the purposes of a preliminary examination, or an investigation, by him under this Act, require any person who, in the opinion of the Ombudsman, is in possession of information, or has a document or thing in his power or control, that is relevant to the examination or investigation to furnish that information, document or thing to the Ombudsman and, where appropriate, may require the person to attend before him for that purpose and the person shall comply with the requirements.
(aa) A requirement under paragraph (a) shall be made by notice in writing given to the person to whom it is directed and shall specify the period within which and the place at which any information, document or thing is to be furnished to the Ombudsman or the place at which a person is to attend before the Ombudsman.
(b) Paragraph (a) of this subsection does not apply to information or so much of a document as relates to decisions and proceedings of the Government or of any committe
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