OPINION OF THE COURT
STAPLETON, Circuit Judge.Our power to review a District Court’s order to remand a case to state court is limited by 28 U.S.C. § 1447(d) (1994), which states, “[a]n order remanding a case to the State court from which it was removed is not reviewable on appeal or otherwise.” The statute provides one exception, not relevant here, for civil rights cases. See id. The Supreme Court has construed this section narrowly, stating, “section [§ 1447(d)] and § 1447(c) must be construed together.... This means that only remand orders issued under § 1447(c) and invoking the grounds specified therein ... are immune from review under § 1447(d).” Thermtron Products, Inc. v. Hermansdorfer, 423 U.S. 336, 345-46, 96 S.Ct. 584, 46 L.Ed.2d 542 (1976).
Section 1447(c) states:
A motion to remand the case on the basis of any defect in removal procedure must be within 30 days after 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.
28 U.S.C. § 1447(c) (1994). We have construed this section to allow the District Court to remand for “(1) lack of district court subject matter jurisdiction or (2) a defect in removal procedure.” PAS v. Travelers Ins. Co., 7 F.3d 349, 352 (3d Cir.1993). Thus, when a District Court bases its decision to remand on one of these grounds, § 1447(d) bars our review. See Balazik v. County of Dauphin, 44 F.3d 209, 213 (3d Cir.1995). Further, § 1447(d) “prohibits review of all remand orders issued pursuant to § 1447(c) whether erroneous or not and whether review is sought by appeal or by extraordinary writ.” Thermtron Products, Inc., 423 U.S. at 343, 96 S.Ct. 584; see also Feidt v. Owens Corning Fiberglas Corp., 153 F.3d 124, 126 (3d Cir.1998).
Here it is clear that the District Court’s order was based on a procedural defect in the notice of removal, and thus the bar applies. The District Court determined that the Rover Group and BMW violated the so-called rule of unanimity which requires that “when there is more than one defendant, all must join in the removal petition.” Lewis v. Rego Co., 757 F.2d 66, 68 (3d Cir.1985). This is a procedural requirement. See Balazik, 44 F.3d at 213 (“Failure of all defendants to join is a ‘defect in removal procedure’ within the meaning of § 1447(c).... ”). In Balazik, plaintiffs brought a § 1983 suit against 13 defendants seeking relief and damages from a county taxing scheme. Three of the defendants removed the case from state court pursuant to §§ 1331, 1441, and 1443. The remaining ten defendants did not join in the removal notice. See id. at 211. Plaintiffs made a timely motion to have the proceedings remanded, claiming that the District Court lacked subject matter jurisdiction. See id. at 212. The District Court rejected the plaintiffs contention that it lacked jurisdiction, but remanded as a matter of comity under the Tax Injunction Act and Fair Assessment in Real Estate Association v. McNary, 454 U.S. 100, 102 S.Ct. 177, 70 L.Ed.2d 271 (1981). On appeal, the plaintiffs contended that the court of appeals could not review the decision because “not all of the defendants joined in the removal, thus *172constituting a ‘defect in removal procedure.’ ” Id. at 213. The court stated,
We agree that the failure of all defendants to remove creates a defect in removal procedure within the meaning of § 1447(c). We would have been required to resolve the issue of our review on that basis, had the district court so held. However, as earlier noted, ... the district court did not rule on a § 1447(c) ground. Thus, the bar to appellate review commanded by § 1447(c) and § 1447(d) is inapplicable in light of the district court’s ground of decision. ...
Id. at 213.
Here the District Court ruled on the procedural defect ground. Like the plaintiffs in Balazik, the plaintiffs here argued that the notice of removal was defective because not all of the defendants consented. The defendants argued that the court should disregard the rule of unanimity because “(1) service upon all defendants was either improper, or plaintiffs failed to establish that service was proper; (2) plaintiffs did not file a return of service forthwith; and, (3) the remaining defendants are nominal and/or fraudulently joined defendants.” App. at 6; see also app. at 113.1 The District Court rejected these arguments finding that plaintiff properly served on Sud Voyages and Palm Tours in Morocco. App. at 6-7. Further, the District Court determined that Sud Voyages and Palm Tours were not nominal or fraudulently joined defendants. See app. at 7-8.
The District Court thus remanded this case to state court on a procedural ground within the meaning of § 1447(c) and, pursuant to § 1447(d), we cannot review this decision.
We are unpersuaded by defendants’ claim that because the District Court had to rule on the exception to the unanimity rule, a separate exception to the § 1447(d) bar applies. In Waco v. United States Fidelity & Guaranty Co., 293 U.S. 140, 55 S.Ct. 6, 79 L.Ed. 244 (1934), the Supreme Court considered a case in which removal was based on the entry of a diverse party into the underlying dispute. The diverse party removed the case on the grounds that a separable controversy existed. The District Court dismissed the third party and remanded for lack of jurisdiction because diversity had been destroyed. See id. at 142. The Supreme Court held that while no appeal could lie from the remand order itself, “in logic and in fact the decree of dismissal preceded that of remand and was made by the District Court while it had control of the cause. Indisputably, this order is the subject of an appeal____” Id. at 143. This is not a true exception to the § 1447(d) bar, rather the Waco Court recognized that where a separate decision necessarily preceded the decision to remand, the court of appeals can review the earlier decision. See Trans Penn Wax Corp. v. McCandless, 50 F.3d 217, 222 (3d Cir.1995) (“The Court in Waco did not create an exception to the bar of review of remand orders; it held only that separable decisions underlying and preceding the remand could be reviewed.”).
Following Waco, we have held that “a district court cannot prevent appellate review of a final collateral order by contemporaneously remanding a case to state court.... Such an order, however, must satisfy two separate jurisdictional requirements. First, it must avoid the bar to *173appellate review in 28 U.S.C. § 1447(d). Second, it must satisfy the finality requirement of 28 U.S.C. § 1291.” Carr v. American Red Cross, 17 F.3d 671, 675 (3d Cir. 1994) (citing Powers v. Southland Corp., 4 F.3d 223, 226 (3d Cir.1993)). Under the first prong, “the order must be both logically precedent to, and separable from, the remand decision.” Id. Defendants contend that the District Court’s remand is “based on its finding that Sud Voyages and Palm Tours actually are defendants in this litigation. The decision is the substantive decision on which the remand depends. If that decision is incorrect, the remand is incorrect. Thus the District Court’s remand order is reviewable.” Grey Br. at 5. This argument is unavailing.
Here, unlike in Waco, there is no separate issue to consider or order to be appealed. Rather, the defendants request review of a decision that was part and parcel of the District Court’s decision to remand in the first place. That is, the District Court ruled on whether the Moroccan defendants were fraudulently added or nominal defendants. In making its decision, the District Court rejected the defendants’ argument that the Moroccan tour companies are nominal defendants because no court sitting in Pennsylvania would have personal jurisdiction over the Moroccan companies. The court had to make that decision in order to rule on whether the rule of unanimity applied and thus whether removal was procedurally proper. Therefore, there is no separable decision for us to review and the Waco fine of cases does not apply.
CONCLUSION
This appeal will be dismissed for want of jurisdiction.
. We recognized an exception to the rule of unanimity in Balazik, stating: "The unanimity rule may be disregarded where: (1) a non-joining defendant is an unknown or nominal party; or (2) where a defendant has been fraudulently joined.” 44 F.3d at 213 n. 4.