16(1)If a tidal work is abandoned or falls into decay, the Port Authority may by notice in writing to the Secretary of State require him either to repair and restore the work or any part of it, or to remove the work and restore its site to its former condition, to such extent as the Port Authority think proper.E+W
(2)If a work authorised by this Act and consisting partly of a tidal work and partly of works on or over land above the level of mean high-water springs is abandoned or falls into decay and that part of the work on or over land above the level of mean high-water springs is in such a condition as to interfere with the right of navigation or other public rights over the foreshore, the Port Authority may include that part of the work, or any portion of it, in any notice under this paragraph.
(3)If after such reasonable period as may be specified in a notice under this paragraph the work specified in the notice has not been done, the Port Authority may do that work and the Secretary of State shall pay the amount of any expenditure reasonably incurred by them in so doing.