(1) No person shall cause or permit any sewage or trade effluent, or any private sewer, to discharge into or communicate with any private or public drain or open storm-water channel.

(2) No person shall cause or permit to be discharged into any private drain, public drain or open storm-water channel any liquid, substance or material which, if discharged into a stream, would not comply with the provisions of the Water Act 1976.

(3) Where the hosing down or flushing by rain-water of an open area on any private property is likely to cause the discharge of objectionable material into any street, gutter, storm-water drain, river, stream or other watercourse, whether natural or artificial, or to cause or contribute towards the pollution of any such watercourse, the local authority may instruct the owner of the property to execute, at his own cost, whatever measures by way of alterations to the drainage installation or roofing lot the area which it may consider necessary to prevent or minimize such discharge or pollution.

(4) The owner or occupier of land on which any liquid other than potable water is stored or processed shall provide all facilities necessary to prevent any leakage or escape of such liquid to any street, storm-water drain or watercourse.