47.—(1) If it appears to the Department, having regard to the development plan and to any other material considerations, that it is expedient to revoke or modify listed building consent in respect of any works to a building, being consent granted on an application made under this Part, the Department may, subject to paragraphs (2) to (4), by order revoke or modify the consent to such extent as (having regard to those matters) it considers expedient.
(2) Before making an order under this Article the Department shall serve notice on the owner and occupier of the building affected and on any other person who in its opinion would be affected by the order; and if within such period as may be specified in that behalf in the notice (not being less than 28 days from the date of service thereof) any person on whom notice is served so requests in writing, the Department shall afford to him an opportunity of appearing before and being heard by the planning appeals commission.
(3) The power conferred by this Article to revoke or modify listed building consent in respect of any works may be exercised at any time before those works have been completed, but the revocation or modification shall not affect so much of those works as has been previously carried out.
(4) Where the Department makes an order under this Article it shall serve a notice on any person mentioned in paragraph (2) stating the general effect of the order.