If I understand your question “is it ever permissible to reground a GROUNDED CONDUCTOR “The Neutral” in most systems. Other than the one item you mentioned the answer is no. The examples listed are for re-grounding a grounding conductor.
A Neutral/grounded conductor that is grounded downstream from the main disconnect, can cause current to flow on the ground system. The equipment grounding conductor will be in parallel with the neutral/grounded conductor. This will effect to operation of ground fault devices, can cause Power Quality issues and in some instances be a life safety issue
