The Commonwealth has approved gender-neutral primogeniture for the British throne. The Duke and Duchess of Cambridge's firstborn will become the heir apparent, whether it's a boy or girl:
"Attitudes have changed fundamentally over the centuries and some of the outdated rules — like some of the rules of succession — just don't make sense to us any more," [British Prime Minister David] Cameron told reporters in Perth.
"The idea that a younger son should become monarch instead of an elder daughter simply because he is a man, or that a future monarch can marry someone of any faith except a Catholic — this way of thinking is at odds with the modern countries that we have become," he added.
The legislation does not affect anyone currently alive, which hardly matters as the first person with an eldest daughter is so far down the list one hopes the question would never come up.