The Act of Proscription (19 Geo. 2, c. 39), also called the Act of Proscription 1746, was an Act of the Parliament of Great Britain, which came into effect in Scotland on 1 August 1746. It was part of a series of efforts to assimilate the Scottish Highlands, ending their ability to revolt, and the first of the "King's laws" that sought to crush the Clan system in the aftermath of the Jacobite rising of 1745. These laws were finally repealed on 1 July 1782.