The Hart-Scott-Rodino Antitrust Improvements Act of 1976 provides that parties to large transactions must notify the Antitrust Division of the US Department of Justice and the US Federal Trade Commission of such transactions in order that they may review them and decide whether a full-scale investigation is warranted. There are three basic tests (the commerce test, the size of persons test and the size of transaction test), all of which must be satisfied in order for the Act to apply and for a filing to be required under the Act.