4. Without prejudice to any other powers conferred on it by this Order, the Department, if it is of opinion that any provision of a scheme or any act or omission of a board—N.I.
(a)is contrary to the interests of consumers of the specified product, or
(b)is contrary to the interests of a substantial number of persons affected by the scheme and is not in the public interest,
may lay before the Assembly a draft of an order revoking the scheme, and if the Assembly resolves that the order shall be approved, the Department shall make the order to take effect on such date as may be specified in the order, being a date after that on which the Assembly resolves that the order shall be approved.