16.—(1) The Environment Agency must review—
(a)the preliminary assessment maps and the preliminary assessment reports prepared by it under regulation 9, and
(b)its determination and identification of flood risk areas under regulation 13.
(2) Following a review, the Environment Agency may prepare a revised preliminary assessment map or report.
(3) The first review must be completed before 22nd December 2017.
(4) Subsequent reviews must be carried out at intervals of no more than 6 years.