SEC. 25. And be it further enacted, That a final judgment or decree in any suit, in the highest court of law or equity of a State in which a decision in the suit could be had, where is drawn in question the validity of a treaty or statute of, or an authority exercised under the United States, and the decision is against their validity; or where is drawn in question the validity of a statute of, or an authority exercised under any State, on the ground of their being repugnant to the constitution, treaties or laws of the United States, and the decision is in favour of such their validity, or where is drawn in question the construction of any clause of the constitution, or of a treaty, or statute of, or commission held under the United States, and the decision is against the title, right, privilege or exemption specially set up or claimed by either party, under such clause of the said Constitution, treaty, statute or commission, may be re-examined and reversed or affirmed in the Supreme Court of the United States upon a writ of error, the citation being signed by the chief justice, or judge or chancellor of the court rendering or passing the judgment or decree complained of, or by a justice of the Supreme Court of the United States, in the same manner and under the same regulations, and the writ shall have the same effect, as if the judgment or decree complained of had been rendered or passed in a circuit court, and the proceeding upon the reversal shall also be the same, except that the Supreme Court, instead of remanding the cause for a final decision as before provided, may at their discretion, if the cause shall have been once remanded before, proceed to a final decision of the same, and award execution. But no other error shall be assigned or regarded as a ground of reversal in any such case as aforesaid, than such as appears on the face of the record, and immediately respects the before mentioned questions of validity or construction of the said constitution, treaties, statutes, commissions, or authorities in dispute.
