Section 16a. That after a decision, order, or requirement has been made by the Commission in any proceeding any party thereto may at any time make application for rehearing of the same, or any matter determined therein, and it shall be lawful for the Commission in its discretion to grant such a rehearing if sufficient reason therefor be made to appear. Applications for rehearing shall be governed by such general rules as the Commission may establish. No such application shall excuse any carrier from complying with or obeying any decision, order, or requirement of the Commission, or operate in any manner to stay or postpone the enforcement thereof, without the special order of the Commission. In case a rehearing is granted the proceedings thereupon shall conform as nearly as may be to the proceedings in an original hearing, except as the Commission may otherwise direct; and if, in its judgment, after such rehearing and the consideration of all facts, including those arising since the former hearing, it shall appear that the original decision, order, or requirement is in any respect unjust or unwarranted, the Commission may reverse, change, or modify the same accordingly. Any decision, order, or requirement made after such rehearing, reversing, changing, or modifying the original determination shall be subject to the same provisions as an original order.

[Section 16. That whenever any common carrier, as defined in and subject to the provisions of this Act, shall violate or refuse or neglect to obey or perform any lawful order or requirement of the Commission created by this Act, not founded upon a controversy requiring a trial by jury, as provided by the seventh amendment to the Constitution of the United States, it shall be lawful for the Commission or for any company or person interested in such order or requirement, to apply in a summary way, by petition, to the circuit court of the United States sitting in equity in the judicial district in which the common carrier complained of lias its principal office, or in which the violation or disobedience of such order or requirement shall happen, alleging such violation or disobedience, as the case may be; and the said court shall have power to hear and determine the matter, on such short notice to the common carrier complained of as the court shall deem reasonable; and such notice may be served on such common carrier, his or its officers, agents, or servants in such manner as the court shall direct; and said court shall proceed to hear and determine the matter speedily as a court of equity, and without the formal pleadings and proceedings applicable to ordinary suits in equity, but in such manner as to do justice in the premises; and to this end such court shall have power, if it think fit, to direct and prosecute in such mode and by such persons as it may appoint, all such inquires as the court may think needful to enable it to form a just judgment in the matter of such petition; and on such hearing the findings of fact in the report of said Commission shall be prima facie evidence of the matters therein stated; and if it be made to appear to such court, on such hearing or on report of any such person or persons, that the lawful order or requirement of said Commission drawn in question has been violated or disobeyed, it shall be lawful for such court to issue a writ of injunction or other proper process, mandatory or otherwise, to restrain such common carrier from further continuing such violation or disobedience of such order or requirement of said Commission, and enjoining obedience to the same; and in case of any disobedience of any such writ of injunction or other proper process, mandatory or otherwise, it shall be lawful for such court to issue writs of attachment, or any other process of said court incident or applicable to writs of injunction or other proper process, mandatory or otherwise, against such common carrier, and if a corporation, against one or more of the directors, officers, or agents of the same, or against any owner, lessee, trustee, receiver, or other person failing to obey such writ of injunction, or other proper process, mandatory or otherwise; and said court may, if it shall think fit, make an order directing 6uch common carrier or other person so disobeying such writ of injunction or other proper process, mandatory or otherwise, to pay such sum of money, not exceeding for each carrier or person in default the sum of five hundred dollars for every day, after a day to be named in the order, that such carrier or other person shall fail to obey such injunction or other proper process, mandatory or otherwise; and such moneys shall be payable as the court shall direct, either to the party complaining or into court, to abide the ultimate decision of the court, or into the Treasury; and payment thereof may, without prejudice to any other mode of recovering the same, be enforced by attachment or order in the nature of a writ of execution, in like manner as if the same had been recovered by a final decree in personam in such court. When the subject in dispute shall be of the value of two thousand dollars or more, either party to such proceeding before said court may appeal to the Supreme Court of the United States, under the same regulations now provided by law in respect of security for such appeal; but such appeal shall not operate to stay or supersede the order of the court or the execution of any writ or process thereon; and such court may, in every such matter, order the payment of such costs and counsel fees as shall be deemed reasonable. Whenever any such petition shall be filed or presented by the Commission it shall be the duty of the district attorney, under the direction of the Attorney-General of. the United States, to prosecute the same; and the costs and expenses of such prosecution shall be paid out of the appropriation for the expenses of the courts of the United States.

If the matters involved in any such order or requirement of said Commission are founded upon a controversy requiring a trial by jury, as provided by the seventh amendment to the Constitution of the United States, and any such common carrier shall violate or refuse or neglect to obey or perform the same, after notice given by said Commission as provided in the fifteenth section of this Act, it shall be lawful for any company or person interested in such order or requirement to apply in a summary way by petition to the circuit court of the United States sitting as a court of law in the judicial district in which the carrier complained of has its principal office, or in which the violation or disobedience of such order or requirement shall happen, alleging such violation or disobedience as the case may be; and said court shall by its order then fix a time and place for the trial of said cause, which shall not be less than twenty nor more than forty days from the time said order is made, and it shall be the duty of the marshal of the district in which said proceeding is pending to forthwith serve a copy of said petition, and of said order, upon each of the defendants, and it shall be the duty of the defendants to file their answers to said petition within ten days after the service of the same upon them as aforesaid. At the trial the findings of fact of said Commission as set forth in its report shall be prima facie evidence of the matters therein stated, and if either party shall demand a jury or shall omit to waive a jury the court shall, by its order, direct the marshal forthwith to summon a jury to try the cause; but if all the parties shall waive a jury in writing, then the court shall try the issues in said cause and render its judgment thereon. If the subject in dispute shall be of the value of two thousand dollars or more either party may appeal to the Supreme Court of the United States under the same regulations now provided by law in respect to security for such appeal; but such appeal must be taken within twenty days from the day of the rendition of the judgment of said circuit court. If the judgment of the circuit court shall be in favor of the party complaining he or they shall be entitled to recover reasonable counsel or attorney's fee, to be fixed by the court, which shall be collected as part of the costs in the case. For the purposes of this Act, excepting its penal provisions, the circuit courts of the United States shall be deemed to be always in session.]