Just because organizations have officers and charters, that by itself DOES NOT make it a corporation.
It must be INCORPORATED according to the laws of the state it exists in.
The document showing it was incorporated is a legal document that shows the corporation exists.
The point remains that free men have the right to associate without the heavy hand of government interference. Some of those free men may choose to associate in religious endeavors, some may associate for recreational purposes and some may associate to produce widgets.
If the central government believes that more widgets should be produced in the US, it should eliminate the hurdles it has erected to domestic widget production rather than pretend that those hurdles don't matter.