There was a federal law during 1929 which stated that any persons being born in or on the canal zone of U.S. Military parents they are U.S. Citizens. I can not remember when this law was cancelled or changed though. That was during a time when they were our friends/allies. The law was done for the military members & the construction & maint. personel who came down from the States, for the Canal zone duty...
It is impossible under the Constitution to somehow create a natural born citizen by statute. You either are, or you are not.
If sufficient citizens of the United States wish to change this requirement, that has been in place for the entirety of the existence of this country, a Constitutional amendment will be required.