Sherco will correct me if I am wrong but I think where he is leading to is where do TM's dispose of the dirty water.
He seems to be saying regulations say you cant just dump it anywhere, and you need a licence to dump it correctly
Was'nt this covered a few weeks ago - some were just outletting at the roadside, others on the garden borders etc.
I remember a different thread saying porty owners should be dumping down the black drain ie toilets not the rain water drains.