In addition to the national policy statement on freshwater management, we've promulgated a national environment standard (NES). Unlike an NPS, which requires plan changes to give effect to what's required, an NES has immediate effect. That NES puts in place controls on increasing intensification of agriculture. For example, a new conversion to a dairy farm will require a resource consent, so that we can consider whether there is an extra nutrient load that the river can't sustain and how adverse effects are minimised. It also puts controls on the additional area that can be put into intensive winter grazing. 