Commentary Schedule 3:  Sustainable drainage
206.This Schedule introduces standards for the design, construction, maintenance and operation of new rainwater drainage systems, and an ‘approving body’. The body, which will generally be a unitary, county or county borough local authority, will be required to approve most types of rain-water drainage systems before any construction work with drainage implications can start. Where the system affects the drainage of more than one property, the approving body will be required to adopt and maintain the system upon satisfactory completion. The Schedule also amends section 106 of the Water Industry Act 1991 to make the right to connect surface water run-off to public sewers conditional on the approval of the drainage system by the approving body.