The Supreme Court has revived a requirement that owners of millions of small businesses register with an arm of the Treasury Department under an anti-money laundering law.

The Corporate Transparency Act, which requires businesses to disclose ownership information, was blocked by a federal judge as beyond Congress’s authority.

The U.S. Supreme Court cleared the way on Thursday for the enforcement of an anti-money laundering federal law that requires corporate entities to disclose the identities of their real beneficial owners to the U.