The Perth Agreement

The succession to the British throne is an ever-shifting situation. Since the 17th century, the rules of order have been determined by both descent and Parliamentary statues.
But to keep up with changing times, the rules around succession have also altered.
In 2013, the Perth Agreement passed and went into full effect in 2015, equalizing the rights of sons and daughters in the British royal line of succession. The new law made it so male heirs are no longer entitled to leapfrog the daughters in line to the throne.
While it’s widely known that Queen Elizabeth II’s firstborn, Prince Charles, will ascend to the monarchy when she dies, changes to succession rules combined with the birth of new family members have made it hard to keep track of who is next in line.