Until the courts provided for in article IV are organized, the courts, their jurisdiction, and the judicial system shall remain as constituted on the date of admission unless otherwise provided by law. When the state courts are organized, new actions shall be commenced and filed therein, and all causes, other than those under the jurisdiction of the United States, pending in the courts existing on the date of admission, shall be transferred to the proper state court as though commenced, filed, or lodged in those courts in the first instance, except as otherwise provided by law.