Neutral in the subpanel

[5xr4uu7]

Where in the code does it say that you cannot bond a neutral and the ground at the subpanel?
having trouble finding it.

thanks

 

[Smart $]

250.24(A)(5) for grounded service-supplied systems and 250.30(A) for grounded separately derived systems.

 

[kwired]

You used to be able to do so for separate buildings, with some conditions.

Now there is only exception for existing ijnstallations that allowed it when it was installed-still with conditions.