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 U.S. Supreme Court agreed to reinstate a federal anti-money laundering law at the request of the federal government while a legal challenge continues in a lower court.

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