You need limits as to sediment and turbidity. How fast you get to those limits is for locals to decide, and under the National Policy Statement for Freshwater Management, it is regional councils that decide on those time frames. We set some objectives to get back to healthy river states that are driven by science, but we leave it to communities as to how they get back there over a generation. There are some interim steps in the national environment standard that kick in straight away, but that's to stop things getting worse. 