The Supreme Court on Tuesday agreed to fast track a case challenging President Donald Trump’s use of emergency powers to impose tariffs on countries around the world.

The action potentially sets the stage for the justices to rule by the end of the year, in line with the Trump administration’s request for a quick decision.

The high court set oral arguments for the first week of November and laid out an expedited schedule for both sides to file briefs ahead of that date.

At issue in the cases are the tens of billions of dollars of tariffs that Trump has collected since February under a nearly 50-year-old piece of legislation known as the International Emergency Economic Powers Act.