12.—(1) Without prejudice to the generality of sub-paragraph 11(4), the requirements which the Environment Agency may impose under that sub-paragraph include—
(a)conditions as to the time and the manner in which any work or operation is to be carried out;
(b)conditions requiring the Council at its own expense—
(i)to provide or maintain means of access for the Environment Agency;
(ii)to construct such protective works, whether temporary or permanent, during the construction of the specified works (including the provision of flood banks, walls or embankments and the strengthening, repair or renewal of existing banks, walls or embankments) as are reasonably necessary to safeguard any drainage work against damage or to secure that its efficiency for flood defence purposes is not impaired and that the risk of flooding is not otherwise increased by reason of any specified work;
(iii)to monitor accumulation, erosion or alterations of the tidal flow arising during the construction or following the completion of the specified works; and
(iv)to provide, maintain and operate arrangements for dealing with any pollution incidents which may occur during and as a result of the construction of the specified works.
(2) Any specified work, and all protective works required by the Environment Agency under sub-paragraph (1)(b)(ii), shall be constructed—
(a)within such period (if any) as the Environment Agency may specify at the time of approval or upon an application by the Council thereafter (such approval not to be unreasonably withheld);
(b)in accordance with plans approved or deemed to have been approved or settled under this Part; and
(c)to the reasonable satisfaction of the Environment Agency,
and the Environment Agency shall be entitled by its officer to watch and inspect the construction of such works.
(3) The Council shall give to the Environment Agency not less than 14 days' notice in writing of its intention to commence construction of any specified work and notice in writing of its completion not later than 7 days after the date on which it is brought into use.
(4) If any part of the works comprising a structure in, over or under a watercourse is constructed otherwise than in accordance with the requirements of this Part, the Environment Agency may by notice in writing require the Council, at the Council’s own expense, to comply with the requirements of this Part or (if the Council so elects and the Environment Agency in writing consents, such consent not to be unreasonably withheld) to remove, alter or pull down the work and, where removal is required, to restore the site to its former condition to such extent as the Environment Agency reasonably requires.
(5) Subject to sub-paragraph (6), if within a reasonable period, being not less than 28 days from the date when a notice under sub-paragraph (4) is served upon the Council, it has failed to begin taking steps to comply with the requirements of the notice and has not thereafter completed them within such reasonable period as may be specified in the notice, the Environment Agency may execute the works specified in the notice and any expenditure incurred by it in so doing shall be recoverable from the Council.
(6) In the event of any dispute as to whether sub-paragraph (4) is properly applicable to any work in respect of which a notice has been served under that sub-paragraph, or as to the reasonableness of any requirement of such a notice, the Environment Agency shall not except in emergency exercise the powers conferred by sub-paragraph (5) until the dispute has been finally determined.