Regulation 4
SCHEDULE 2REQUIREMENTS FOR COLLECTING SYSTEMS
1. Collecting systems shall take into account waste water treatment requirements.
2. The design, construction and maintenance of collecting systems shall be undertaken in accordance with the best technical knowledge not entailing excessive costs, notably regarding—
(a)volume and characteristics of urban waste water;
(b)prevention of leaks;
(c)limitation of pollution of receiving waters due to storm water overflows.