The reason for this?
So she can more easily be spotted in the crowd by members of the public (viaMental Floss).
Perhaps the most regulated area is the hair, however, which must always be kept neat and natural.
Here are some hairstyles that are totally off-limits to the British royal family, perVogue Australia.
In other words, even buns and ponytails on weekend mornings need to be tidy and natural.
Luckily, in this instance at least, the royal rules have been stretched a bit over time.
