4There shall be paid out of the fund—
(a)all expenses incurred by the Board in respect of which a grant is payable under the principal section out of moneys provided by Parliament;
(b)all other expenses incurred by the Central Electricity Board under subsection (1) of the principal section;
(c)all payments falling to be made by the Board in respect of the principal and interest of any loan raised by the Board under the last preceding paragraph; and
(d)all expenses incurred by the Board in administering the fund.