The North Carolina General Statutes address child relocation only in the limited context of domestic violence having occurred; see NCGS 50-13.2(b). Since domestic violence doesn’t appear to be an issue in your case, the court will need to determine if this proposed relocation constitutes a substantial change of circumstance affecting the welfare of your son. If the court’s conclusion is “yes,” it then applies the “best interest of the child” standard when determining whether to allow the move.
In a practical sense, the visitation schedule will have to change if the court allows the move. California is a long way from North Carolina. The only way the court can change the existing order