There is no federal law that defines the term “Natural Born Citizen” either. The Supreme Court has not established precedent on who qualifies as being “natural born.”
Several cases testing the definition with regard to Obama went to conference at the Supreme Court and thus far, all have been denied “cert.” Meaning the Justices did not accept any of the cases for a hearing before the full Court.
It takes four justices to agree to “grant cert” or agree to hear a case.
I am of the opinion that “Natural Born Citizen” is the Opposite of “Naturalized Citizen” -— I am of the opinion that “Natural Born Citizen” means that you must have been a full US Citizen at the very moment of Birth.
Yes, some legislation or a Court Ruling, in the matter, would help.