25.—(1) Any specified or protective works must, when commenced, be constructed—
(a)with all reasonable dispatch in accordance with the plans approved or deemed to have been approved or settled as aforesaid and with any specifications made under paragraph 21 and paragraph 22 of this Part;
(b)under the supervision (if given) and to the reasonable satisfaction of the engineer;
(c)in such manner as to cause as little detriment as is reasonably practicable;
(d)in such manner as to cause as little inconvenience as is reasonably practicable to CRT, its officers and agents and all other persons lawfully using the waterways, except to the extent that temporary obstruction has otherwise been agreed by CRT; and
(e)in such a manner so as to ensure that no materials are discharged or deposited into the waterway otherwise than in accordance with article 14 (discharge of water).
(2) Nothing in this Order authorises the undertaker to make or maintain any permanent works in or over the waterway so as to impede or prevent (whether by reducing the width of the waterway or otherwise) the passage of any vessel which is of a kind (as to its dimensions) for which CRT is required by section 105(1)(b) and (2) of the Transport Act 1968 M1 to maintain the waterway.
(3) Following the completion of the construction of the specified works the undertaker must restore the waterway to a condition no less satisfactory than its condition immediately prior to the commencement of those works unless otherwise agreed between the undertaker and CRT.
(4) In assessing whether the condition of the waterway is no less satisfactory than immediately prior to the works pursuant to sub-paragraph (3), CRT and the undertaker must take account of any survey issued pursuant to paragraph 20 and any other information agreed between them pursuant to this Part 3.