4Except as provided by the last preceding paragraph, the Act of 1938 and Part I of this Act shall not have effect in relation to any hire-purchase agreement, credit-sale agreement or conditional sale agreement which—
(a)is of a class to which the Act of 1938 or, as the case may be, section 21 of this Act, applies by virtue only of such an Order in Council as is mentioned in the last preceding paragraph, and
(b)is made before the date on which that Order comes into operation.