(1) The Commissioner may, for the purposes of a review under section 22 or an investigation under section 44 -

(a) require any person who, in the opinion of the Commissioner, is in possession of information, or has a record in his or her power or control, that, in the opinion of the Commissioner, is relevant to the purposes aforesaid to furnish to the Commissioner any such information or record that is in his or her possession or, as the case may be, power or control and, where appropriate, require the person to attend before him or her for that purpose, and

(b) examine and take copies in any form of, or of extracts from any record that, in the opinion of the Commissioner, is relevant to the review or investigation and for those purposes take possession of any such record, remove it from the premises and retain it in his or her possession for a reasonable period.

(2) The Commissioner may for the purposes of such a review or investigation as aforesaid enter any premises occupied by an FOI body and there -