How did the 1953 constitution affect succession to Denmark’s throne?

The 1953 constitution of Denmark fundamentally altered the rules of royal succession by introducing female succession to the throne. This change was enacted through the Succession to the Throne Act, which accompanied the new constitution.123

Prior to this amendment, the throne was restricted to male heirs. The 1953 reform allowed King Frederik IX’s eldest daughter, Margrethe II, to become the heir to the throne. Following her father's death in 1972, this constitutional provision enabled her to ascend as queen, marking a significant shift in the history of the Danish monarchy.1423