Like with everything else, too, the protocol for tiara-wearing is strict and exception-heavy.

The person wearing the borrowed tiara keeps it for their lifetime.

Whether or not they wear it is up to them.

Princess Anne wearing a green jacket with her hair pulled back looking over her shoulder at the camera

When a tiara is loaned out, it’s for a specific reason.

For example,the Queen gave Kate Middletonthe Cambridge Lover’s Knot to borrow.

Other rules about tiara-wearing are more about presentation than tradition.

Princess Anne wearing a fur hat, looking off to the side

For instance, royals don’t wear tiaras before 5 p.m. unless it’s a royal wedding.

Did Princess Anne go against protocol when she wore a tiara before she was married?

Princesses also aren’t seen wearing tiaras before they’re married.

It wasn’t surprising not to see Kate Middleton or Meghan Markle sporting sparkle before they became official royals.

Unofficially, tiaras also aren’t worn but royals until they turn eighteen.

According toMarie Claire, tiaras are often a gift for the woman’s eighteenth birthday.

So didPrincess Annereally break protocol when she wore tiaras before she got married?

Protocol about how and when a tiara is worn has changed over the years.

However, the tiaras were worn only for white tie events, where all women wore tiaras if available.