17. (1) The Board may, either generally or otherwise as provided by resolution, by instrument under its common seal, delegate any of its powers under this Act, other than this power of delegation, to—
(a) a member; or
(b) a member of the staff of the Board.
(2) A certificate signed by the Chairperson stating any matter with respect to a delegation under this section is evidence of that matter.
(3) A document purporting to be a certificate referred to in subsection (2) shall, unless the contrary is established, be deemed to be such a certificate and to have been duly given.