21. —(1) The Minister may advance moneys from the Central Fund or the growing produce thereof to the Post Office Savings Bank Fund on such terms and conditions as he or she thinks fit for the purposes of section 22 .

(2) The Minister may by order delegate to the Agency the function conferred on him or her by subsection (1).

(3) An order under subsection (2) may contain such ancillary and incidental provisions as the Minister considers necessary or expedient for the purposes of the delegation effected by the order including a provision specifying the maximum amount of moneys which may be advanced from the Central Fund or the growing produce thereof to the Post Office Savings Bank Fund for the purpose of providing central treasury services.

(4) If the function conferred on the Minister by subsection (1) stands delegated to the Agency by virtue of an order under subsection (2), the Minister may give directions or guidelines to the Agency in relation to the performance by it of that function, and the Agency shall comply with any such directions and perform that function in accordance with any such guidelines.