Manawatu-Wanganui Regional Council is holding a series of fieldays to outline the implications for farmers if its proposed One Plan is confirmed.
It combines the region's various resource management plans into a single document covering the next 10 years.
The water section would require some intensive farming activities, including cropping and vegetable production, irrigated sheep and beef farms and dairy conversions, to obtain consents to operate.
Farmers would also require a plan to reduce nutrients and contaminants going into streams and lakes.
Implementation manager Peter Taylor, says the new policy has been tested on 21 farms across the region,to see how they are managed and how the policy may impact on them.
The fieldays start at Eketahuna on Wednesday and end at Bulls in November.