HSR meaning in Governmental ?

The Hart–Scott–Rodino Antitrust Improvements Act of 1976 (Public Law 94-435, known commonly as the HSR Act) is a set of amendments to the antitrust laws of the United States, principally the Clayton Antitrust Act. The HSR Act was signed into law by president Gerald R. Ford on September 30, 1976. The context in which the HSR Act is usually cited is 15 U.S.C. § 18a, title II of the original law. The HSR Act is named after senators Philip A. Hart and Hugh D. Scott, Jr. and representative Peter W. Rodino.

The HSR Act provides that parties must not complete certain mergers, acquisitions or transfers of securities or assets, including grants of executive compensation, until they have made a detailed filing with the U.S. Federal Trade Commission and Department of Justice and waited for those agencies to determine that the transaction will not adversely affect U.S. commerce under the antitrust laws. While parties can carry out due diligence and plan for post-merger integration, they may not take any steps to integrate operations, such as an acquiring party obtaining operational control of the acquired party.