The U.S. Supreme Court on Thursday declined to block enforcement of an anti-money laundering law that forces millions of business entities to disclose the identities of their real beneficial owners to the Treasury Department,

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.