In the British monarchy, a young heir like George becoming King brings up governance questions. The 1937 Regency Act was made for when the Sovereign is too young or unable to rule.
It came after King George V’s illness. They realized they needed a plan. Under this Act, if George becomes King before 18, a Regent will be picked to do royal duties until he’s old enough.
The Regent does all the Sovereign’s jobs, like signing laws and representing the monarchy. They’re crucial for keeping things running smoothly. The Regent is usually the next eligible adult in line.