For the purposes of this Act:
(a) each tribunal, authority or body specified in Schedule 1 is deemed to be a prescribed authority;
(b) the holder of an office pertaining to a tribunal, authority or body specified in Schedule 1, being an office established by the legislation establishing the tribunal, authority or body so specified in his or her capacity as the holder of that office, is not to be taken to be a prescribed authority or to be included in a Department; and
(c) a registry or other office of or under the charge of a tribunal, authority or body specified in Schedule 1, and the staff of such a registry or other office when acting in a capacity as members of that staff, shall be taken as a part of the tribunal, authority or body so specified as a prescribed authority;
but this Act does not apply to any request for access to a document of a tribunal, authority or body so specified unless the document relates to matters of an administrative nature.