Dartford-Thurrock Crossing Act 1988

3 E+W If, within a period specified in paragraph 2 above, any part of the river becomes subjected to silting or scouring in circumstances in which the making good of that silting or scouring is, at the instance of a protected body, the responsibility of the Secretary of State under that paragraph, the provisions of that paragraph shall apply for the benefit of that protected body to any recurrence of that silting or scouring within the remainder of the period ending twenty years from the completion of the construction of the bridge, or, as the case may be, from the commencement of the tidal work in connection with the maintenance or improvement of the bridge, as they apply to silting or scouring to which that part of the river is subjected within the period specified in paragraph 2.