Paragraph 23
Subject to sub-paragraph (5), the undertaker must from the commencement of the construction of the specified work as constructed in accordance with paragraph 22 and protective work as constructed in accordance with paragraph 10, maintain in good repair and condition and free from obstruction any drainage work which is situated within the Order Limits on land held by the undertaker for the purposes of or in connection with the specified work, whether or not the drainage work is constructed under the powers conferred by this Order or is already in existence.
If any such specified work or protective work which the undertaker is liable to maintain is not maintained to the reasonable satisfaction of the drainage authority, the drainage authority may by notice in writing require the undertaker to repair and restore the work, or any part of such work, or (if the undertaker so elects and the drainage authority in writing consents, such consent not to be unreasonably withheld or delayed), to remove the specified work and any protective work and restore the site to its former condition, to such extent and within such limits as the drainage authority reasonably requires.
Subject to sub-paragraph (4), if, within a reasonable period, being not less than 28 days beginning with the date on which a notice in respect of any specified work or protective work is served under sub-paragraph (2) on the undertaker, the undertaker has failed to begin taking steps to comply with the reasonable requirements of the notice and has not subsequently made reasonably expeditious progress towards their implementation, the drainage authority may do what is reasonably necessary for such compliance and any reasonable expenditure incurred by the drainage authority in so doing is recoverable from the undertaker.
In the event of any dispute as to the reasonableness of any requirement of a notice served under sub-paragraph (2), the drainage authority must not, except in the case of an emergency, exercise the powers conferred by sub-paragraph (3) until the dispute has been finally determined in accordance with paragraph 28.
This paragraph does not apply to—
drainage works that are vested in the drainage authority or that the drainage authority or another person is liable to maintain and is not prevented by this Order from so doing; and
any obstruction of a drainage work for the purpose of a work or operation authorised by this Order and carried out in accordance with the provisions of this Part.