OPINION OF THE COURT
Plаintiffs appeal the district court’s order granting summary judgment in favor of the Defendants based on that court’s conclusion that Plаintiffs’ motion to vacate was untimely. Plaintiffs argue that the district court erroneously relied on our decision in Roadway Package System, Inc. v. Kay ser,
I.
As we write primarily for the parties, we need not recite the facts or procedural background except insofar as they are helpful to our discussion.
This case arises from a stock purchase agreement (“SPA”) entered into by the parties in 1999, providing for arbitration of any dispute arising from the agreement. The SPA also contained a generic choice-of-law provision which stated that the agreement was to be “governed by and construed in accordance with the laws of the State of Delaware without regard to choice of law principles.... ”
In 2004, the parties entered into arbitration tо resolve a dispute that had arisen under the SPA. The arbitrator resolved that dispute in Defendants’ favor, and Plaintiffs then initiated this аction under the Delaware Uniform Arbitration Act (“DUAA”) in the Eastern District of Pennsylvania in an attempt to vacate the arbitratiоn award.
Defendants moved for summary judgment on the grounds that the action was untimely under § 12 of the FAA, which requires that a motion to vacate an arbitration award be served upon the adverse
II.
Plaintiffs argue that the district court erred in concluding that the FAA, rather than the DUAA, governed their motion to vacate. They argue that the Supreme Court’s decision in Hall Street makes Roadway inapposite by clarifying that partiеs may seek judicial review of arbitration decisions under any applicable law, so long as the law is not preempted by the FAA.
As the district court noted, it is uncontested that the SPA falls within the broad reach of the FAA. However, as we explained in Roadway Package, рarties can contract out of the FAA and select alternate rules to govern arbitration proceedings betwеen them. To do so, parties must “manifest[ ] a clear intent,”
As noted at the outset, Plaintiffs argue that Roadway has been undermined by the Supreme Court’s intervening decision in Hall Street. According to Plaintiffs, Hall Street effectively overruled Roadway under the circumstances here,
According to Plaintiffs, these few sentences undermine the contractual intent frаmework elucidated in Roadway, and usher in a new regime in which a plaintiff may select any cause of action, so long as it is not preempted by the FAA. Plaintiffs insist that, after Hall Street, the essential inquiry in determining the applicable law in situations such as these is not the parties’ intent beforehand as expressed in the arbitration agreement. Rather, it is the plaintiffs subsequent intent as set forth in the action to vacate an arbitration award. Because Plaintiffs only assert claims under the DUAA, they argue that the district court еrred in relying on time limitations established in the FAA. The argument is merit less.
III.
For the reasons stated above, we will affirm the decision of the District Court.
Notes
. The district court had jurisdiction pursuant to 28 U.S.C. § 1332. We have jurisdiction pursuant to 28 U.S.C. § 1291. Our review of a motion to vacate a commercial arbitration award is de novo. Dluhos v. Strasberg,
. Plaintiffs initiated this action by filing a complaint and subsequently amending that complaint rather than by filing a motion to vacate the arbitration award as is required under the FAA. However, the district court appropriately exercised its discretion to consider the amended comрlaint as a motion to vacate the arbitration award, see O.R. Sec., Inc. v. Prof'l Planning Assocs.,
. Plaintiffs also argue that the district court erred by failing to consider whether apрlication of the FAA was inappropriate in light of Guaranty Trust Co. v. York,
. Hall Street resolved a split of authority among the Circuit Courts of Apрeals as to whether parties to agreements subject to the FAA could supplement by contract the standards for vаcatur and modification of arbitration awards set forth in §§ 9, 10, and 11 of the FAA. The Court concluded that they could not. It is therefore uncontested that Hall Street abrogates one holding of Roadway, that parties to agreements subject to the FAA can specifically contract out of the FAA stаndards of review. Plaintiffs argue, however, that certain dicta in Hall Street also abrogate the second holding of Roadway, that a generic choice-of-law clause is insufficient to demоnstrate an intent to contract around the FAA entirely. We disagree.
. In their Reply brief, Plaintiffs change their argument substantially, and argue that Roadway is inapplicable here, not because of Hall Street, but because our decision in Roadway concerned preemption, rather than contract construction. It is, of course, inappropriate to raise an argument for the first time in a Reply brief. Moreover, the argument is belied by our clear assertion in Roadway that the question before us was “not one of choice-of-law or preemption” but "simply a matter of contract construction.”
