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 act aims to stop fraud and money laundering by requiring most U.S. businesses to disclose which owners control more than 25 percent of the stock or equity.