On March 5, 2014, the Supreme Court of the United States (the Court or Supreme Court) rendered its decision in BG Group PLC v. Republic of Argentina (BG Group). Applying principles from judicial review of commercial arbitration awards to the investment treaty context, the Court overturned a decision of the United States Court of Appeals that vacated an investment treaty arbitral award. BG Group is significant because it is the first time that the Supreme Court has reviewed an investment treaty arbitration.