"An Act prohibiting the proclaiming any person to be King of England or Ireland, or the Dominions thereof" purported to be an Act of the Parliament of England, enacted without royal assent on the same day as the execution of King Charles I of England on 30 January 1649, during the English Civil War. The purpose of the Act was to prevent the automatic succession of Charles's son as King, or the proclamation of another person as King.
This legislation was introduced with the intention of preventing Charles's son from inheriting the throne automatically and also stopping the proclamation of another person as king. This law was passed on the same day that King Charles I was executed in 1649, amidst the English Civil War.