((a)) The relations between the courts established by the Constitution or laws of the United States and the courts of the Northern Mariana Islands with respect to appeals, certiorari, removal of causes, the issuance of writs of habeas corpus, and other matters or proceedings shall be governed by the laws of the United States pertaining to the relations between the courts of the United States including the Supreme Court of the United States, and the courts of the several States in such matters and proceedings, except as otherwise provided in article IV of the covenant: , That for the first fifteen years following the establishment of an appellate court of the Northern Mariana Islands the United States court of appeals for the judicial circuit which includes the Northern Mariana Islands shall have jurisdiction of appeals from all final decisions of the highest court of the Northern Mariana Islands from which a decision could be had in all cases involving the Constitution, treaties, or laws of the United States, or any authority exercised thereunder, unless those cases are reviewable in the District Court for the Northern Mariana Islands pursuant to .
((b)) Those portions of title 28 which apply to Guam or the District Court of Guam shall be applicable to the Northern Mariana Islands or the District Court for the Northern Mariana Islands, respectively, except as otherwise provided in article IV of the covenant. The district court established by this subchapter shall be a district court as that term is used in .