Federated Farmers says it is highlighting the case for a review of land deemed "low slope" for the purposes of stock exclusion from waterways.
"We're about to survey our members to get more specific information on where the Ministry for the Environment's final low slope maps are wrong, so we can advocate for the best way forward," Feds water spokesman Chris Allen said.
According to Allen, the low slope maps take in some hill and high country that is so steep, farmers would need to pay for helicopters to lift poles and other supplies in order to fence off the waterways.
"The government requirements as written have come as one hell of a shock to low intensity/high country farmers given the obscene costs it will take to comply."