The Royal Banner of the Royal Arms of Scotland, commonly the Lion Rampant of Scotland, and historically as the Royal Standard of Scotland, is the Royal Banner of Scotland, and historically, the Royal Standard of the Kingdom of Scotland, historically used by the King of Scots, the banner differs from Scotland's national flag, the Saltire, in that its correct use is restricted by an Act of the Parliament of Scotland to only a few Great Officers of State who officially represent the Sovereign in Scotland, which is called what, and is the constitutional monarchy of the United Kingdom, its dependencies and its overseas territories?