So went and did some education (googling ) on how NRS etc are enforced
It is not as simple as to say NRS is not mentioned in the SANS so therefore it is not illegal.
It actually seem quite convoluted
At a top level standards and specifications are enforced from the OHA and ERA acts
They enable the standards that all installations have to abide by and directly enable the requirements required in municipal bylaws.
NRS is just the specification that all equipment that is connected to the grid has to abide by. So saying it has to feedback into the grid to be relevant is just noise.
As far as I know all the large municipalities have bylaws that require NRS for equipment to be connected to their grids.
JHB, EKH,PTA and COCT all have them
Some bylaws actually go further and reference planning approval as well ( Good Luck Pretoria )
I havent gone and checked Pretoria Bylaws ( I dont care enough as I dont live there ) but I saaw it being referenced a few times. But it raises interesting questions where for example if you created a structure with panels up ( like a carport ) it is regarded as coverage and thus has to be on building plans.
Edit : On the surface it looks like the feedback chrisc's client got was correct. The bylaws enable nrs so the reason he got fined was an illegal connection according to bylaws
