The Union and Security Act (Swedish: Förenings- och säkerhetsakten, Finnish: Yhdistys- ja vakuuskirja), alternatively Act of Union and Security, was proposed by King Gustav III of Sweden to the assembled Estates of the Realm during the Riksdag of 1789.
[1] During the Russo-Swedish War, in February 1789, Gustav summoned the Riksdag of the Estates and placed an Act of Union and Security before them.
[1] The Act of Union and Security gave the King the sole power to declare war and make peace instead of sharing the power with the estates and the Privy Council.
The judicial branch of the Privy Council (in Swedish: Justitierevisionen) was then transferred to a new Supreme Court.
[4] Most noble privileges were abolished with the Act, with most offices now available to all regardless of rank.