Paragraph 50
Subject to sub–paragraph (2), any specified work, and all protective works required by the relevant drainage authority under paragraph 4 must be constructed—
without unreasonable delay in accordance with the plans approved or deemed to have been approved or settled under this Part of this Schedule; and
to the reasonable satisfaction of the relevant drainage authority
and an officer of the relevant drainage authority is entitled to watch and inspect the construction of such works.
The undertaker must give to the relevant drainage authority—
not less than 14 days’ notice in writing of its intention to commence construction of any specified work and any protective work; and
notice in writing of its completion not later than 7 days after the date on which it is completed.
If the relevant drainage authority reasonably requires, the undertaker must construct all or part of the protective works so that they are in place prior to the construction of the specified work to which the protective works relate.
If any part of a specified work or any protective work required by the relevant drainage authority is constructed otherwise than in accordance with the requirements of this Part of this Schedule, the relevant drainage authority may by notice in writing require the undertaker at the undertaker’s expense to comply with the requirements of this Part of this Schedule or (if the undertaker so elects and the relevant drainage authority in writing consents, such consent not to be unreasonably withheld or delayed) to remove, alter or pull down the work and, where removal is required, to restore the site to its former condition to the reasonable satisfaction of the relevant drainage authority and to such extent and within such limits as the relevant drainage authority may reasonably require.
Subject to sub–paragraph (6) and paragraph 10 if, within a reasonable period, being not less than 28 days beginning with the date when a notice under sub–paragraph (4) is served on the undertaker, the undertaker has failed to begin taking steps to comply with the requirements of the notice and has not subsequently made reasonably expeditious progress towards their implementation, the relevant drainage authority may execute the works specified in the notice and any expenditure reasonably incurred by the relevant drainage authority in so doing is recoverable from the undertaker.
In the event of any dispute as to whether sub–paragraph (4) is properly applicable to any work in respect of which notice has been served under that sub–paragraph, or as to the reasonableness of any requirement of such a notice, the relevant drainage authority must not except in the case of an emergency exercise the powers conferred by sub–paragraph (5) until the dispute has been finally determined in accordance with paragraph 11.