Undoing many of the policies of his predecessor is one of President Joe Biden’s top priorities. In early February, Biden even got a little defensive about all the executive actions he was taking in his first days in office to halt policies set by President Donald Trump. “I’m not making new law,” he said Feb. 2. “I’m eliminating bad policy.”

But as easy as it sounds on the campaign hustings or in a 30-second political ad, it’s complicated to overturn rules from earlier administrations. There is one tool, however, that Biden and the Democratic Congress could use to undo the policies the Trump administration left behind. A little-used law called the Congressional Review Act allows a new administration with a like-minded Congress to fast-track the repeal of regulations and other executive actions with simple majority votes in both chambers and no filibuster in the Senate.

So far, though, Congress has made no attempt to use it, and the president has not called for it. And it appears there are no specific plans to do so, at least not on health-related policies.