13.—(1) Where a tidal work is abandoned or suffered to fall into decay the Scottish Ministers may by notice in writing require the Authority at its own expense either to repair and restore the work or any part thereof, or to remove the work and restore the site thereof to its former condition, to such an extent and within such limits as the Scottish Ministers think proper.
(2) Where a work authorised by this Order and consisting partly of a tidal work and partly of works on or over land above the level of high water is abandoned or suffered to fall into decay and that part of the work on or over the land above the level of high water is in such condition as to interfere or to cause reasonable apprehension that it may interfere with the right of navigation or other public rights over the foreshore, the Scottish Ministers may include that part of the work, or any portion thereof, in any notice under this article.
(3) If, on the expiration of 30 days from the date when a notice under this article is served upon the Authority it has failed to comply with the requirements of the notice, the Scottish Ministers may execute the works specified in the notice and any expenditure incurred by them in so doing shall be recoverable from the Authority as a debt.