Payments on account4.
A payment on account of the sum specified in article 3(1)(a), or of an additional amount referred to in article 3(1)(b), may be made only if the Commissioners are satisfied—
(a)
that the amount of the payment is a portion of a sum of money needed by the Churches Conservation Trust, and
(b)
that the balance of that sum will be paid to the Trust out of moneys provided by Parliament.