Dartford-Thurrock Crossing Act 1988

8 All works for the provision of new, altered or substituted drainage works or sewers or protective works in pursuance of paragraph 7 above shall be carried out to the reasonable satisfaction of the protected authority and, where so required by the protected authority, by or under the supervision (if given) of an officer of the protected authority duly appointed for the purpose; and all reasonable costs and expenses to which the protected authority may be put by reason of such works, whether in the course of the carrying out of the works, or in the preparation or examination of plans or designs or in such supervision, or otherwise, shall be payable to the protected authority by the Secretary of State.