28 U.S.C. § 1447 : US Code - Section 1447: Procedure after removal generally

      (a) In any case removed from a State court, the district court
    may issue all necessary orders and process to bring before it all
    proper parties whether served by process issued by the State court
    or otherwise.
      (b) It may require the removing party to file with its clerk
    copies of all records and proceedings in such State court or may
    cause the same to be brought before it by writ of certiorari issued
    to such State court.
      (c) A motion to remand the case on the basis of any defect other
    than lack of subject matter jurisdiction must be made within 30
    days after the filing of the notice of removal under section
    1446(a). If at any time before final judgment it appears that the
    district court lacks subject matter jurisdiction, the case shall be
    remanded. An order remanding the case may require payment of just
    costs and any actual expenses, including attorney fees, incurred as
    a result of the removal. A certified copy of the order of remand
    shall be mailed by the clerk to the clerk of the State court. The
    State court may thereupon proceed with such case.
      (d) An order remanding a case to the State court from which it
    was removed is not reviewable on appeal or otherwise, except that
    an order remanding a case to the State court from which it was
    removed pursuant to section 1442 or 1443 of this title shall be
    reviewable by appeal or otherwise.
      (e) If after removal the plaintiff seeks to join additional
    defendants whose joinder would destroy subject matter jurisdiction,
    the court may deny joinder, or permit joinder and remand the action
    to the State court.