24.—(1) A person on whom a copy of a notice has been served under Article 23 may, at any time before the end of the period allowed for compliance with that notice, appeal to the planning appeals commission against the notice.
(2) An appeal may be brought on any of the following grounds—
(a)that the matters alleged in the notice do not constitute development;
(b)that the development alleged in the notice has not taken place;
(c)that the period of four years referred to in Article 23(2) had elapsed at the date when the notice was issued.
(3) An appeal under this Article shall be made by notice in writing to the planning appeals commission and such notice shall indicate the grounds of the appeal and state the facts on which it is based.
(4) Before determining an appeal under this Article, the planning appeals commission shall, if either the appellant or the Department so desires, afford to each of them an opportunity of appearing before and being heard by the commission.
(5) Where an appeal is brought under this Article the notice shall be of no effect pending the final determination or the withdrawal of the appeal.
(6) On an appeal under this Article the planning appeals commission—
(a)shall quash the notice, vary the terms of the notice or uphold the notice;
(b)may correct any informality, defect or error in the notice, or vary its terms, if it is satisfied that the correction or variation can be made without injustice to the appellant or to the Department.
(7) The validity of a notice under Article 23 shall not, except by way of an appeal under this Article, be questioned in any proceedings whatsoever on any of the grounds on which such an appeal may be brought.