Hard to see how this will work alongside the Fisheries Act. Regional Councils are essentially fisheries managers now. 

"The Environment Court’s decision is considered ground-breaking because it is the first time anyone has successfully used the Resource Management Act to ban specific commercial fishing practices."

Northland Regional Council confirms Bay of Islands fishing ban formally adopted - NZ Herald
https://www.nzherald.co.nz/northern-advocate/news/northland-regional-council-confirms-bay-of-islands-fishing-ban-formally-adopted/FVMT5WQFRNGIFL2FXVYWD5QF3A/ 

 Seems like there will be lots of consultancy work coming up advising regional councils on fisheries...