Paragraph 17 Surface and foul water drainageI1

No phase of the authorised development may commence until written details of the surface and foul water drainage system for that phase have been submitted to and approved by the local planning authority.

The details submitted under sub-paragraph (1) must be in accordance with and include the plans and strategies referred to in the flood risk assessment and outline drainage strategy forming appendix 8.1 of the environmental statement.

The surface and foul water drainage system for the relevant part of the authorised development must be implemented in accordance with the approved details and maintained throughout the operation of the relevant part of the authorised development to which the plan relates.