Whether an abstention-based remand order is immediately appealable under 28 U.S.C. § 1291.
Holding
Yes. A remand order based on Burford abstention is immediately appealable because it is functionally final and satisfies the collateral-order doctrine.
Reasoning
Section 1447(d) did not bar review. Under Thermtron and Things Remembered, § 1447(d) bars appellate review only for remands based on the grounds listed in § 1447(c): lack of subject-matter jurisdiction or a defect in removal procedure. The District Court remanded on abstention grounds, which fit neither category.
Although § 1291 usually permits appeal only after a final merits judgment, Moses H. Cone establishes that an abstention order can be appealable when it effectively puts the parties out of federal court. A Burford-based remand does exactly that: the federal court completely disassociates itself from the case and surrenders the dispute to state court.
The order also met the collateral-order criteria. It conclusively resolved the separate question whether the federal court should decline jurisdiction for reasons of comity and federalism; that question was important; and it could not be effectively reviewed after a final judgment because there would be no later federal merits judgment from which to appeal.
The Court disavowed any contrary implication in Thermtron that remand orders may be reviewed only through mandamus. In light of Moses H. Cone, an abstention-based remand that is functionally equivalent to a final surrender of federal jurisdiction is appealable under § 1291.