Meghan Markle and Kate Middleton both have to follow this strict footwear rule

From pantyhose to conservative hemlines, there seems to be an endless list of royal dress codes that Meghan Markle has had to adopt since becoming the Duchess of Sussex on May 19th. And though her style transformation from commoner to duchess is worthy of a princess, and has indeed proven her commitment to her new royal identity, we had no idea just *how* extreme the evolution would be. 

One royal rule she's recently had to adopt? Closed-toe shoes. And closed-toe shoes only. 

Of course, the dress code doesn't just apply to Meghan, but it's a rule that the Duchess of Cambridge, the Duchess of Cornwall and even Princess Eugenie seem to adhere to. 

Photo: Getty

Said etiquette expert William Hanson to Harper's Bazaar: "Open-toed shoes are considered informal footwear and inappropriate for formal occasions." Hanson explained that it was even "requested" that guests attending the May 19th nuptials  ditch their open-toed shoes in favor of more formal footwear, though some of the higher-profile guests made their own rules. 

RELATED: Strict royal rules: 

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21 strict royal rules

THEY MUST ACCEPT ALL GIFTS GRACIOUSLY

While the royal family has to accept every gift that they receive (even if it’s something super lame), it’s up to Queen Elizabeth who gets to keep which gift.

PRINCE PHILIP IS REQUIRED TO WALK BEHIND THE QUEEN

Since their marriage, Her Majesty’s husband must walk a few steps behind her at all times. Who run the world?

THERE’S A STRICT DRESS CODE

Members of the royal family are expected to dress modestly and never overtly casual. (Serious question: Can you imagine a life without sweatpants?) That doesn’t mean that they can’t have some fun, though.

RELATED: BREAKING ROYAL NEWS: KATE MIDDLETON ISN’T ALLOWED TO WEAR NAIL POLISH

THEY CAN’T JUST PROPOSE WILLY-NILLY

According to the Royal Marriages Act of 1772, royal descendants must seek the monarch’s approval before proposing. (AhemHarry and Meghan.)

RELATED: THE 9 ROYAL WEDDING TRADITIONS WE CAN EXPECT TO SEE WHEN HARRY AND MEGHAN TIE THE KNOT

TWO HEIRS CANNOT FLY TOGETHER

That’s in case something tragic were to happen. Once Prince George (who is third in line to the throne after Prince Charles and Prince William) turns 12, he will have to fly separately from his dad.

AND THEY ALWAYS TRAVEL WITH AN ALL-BLACK ENSEMBLE

The royal family is nothing if not prepared. A respectable all-black outfit is packed with them on their travels in case of a sudden death and they must attend a funeral.

PDA IS FROWNED UPON

Although there is no formal law that forbids future monarchs from showing affection, Queen Elizabeth II set a precedent that encourages royals to keep their hands to themselves. Which is why you rarely see Prince William and Kate Middleton smooching in public, or even holding hands. Prince Harry and Meghan Markle, on the other hand, are not under as much pressure to adhere to this protocol.

NO POLITICS ALLOWED

Members of the royal family are not allowed to vote or even publicly express their opinion on political matters.

WHEN THE QUEEN STANDS, SO DO YOU

And don’t even think about sitting until Her Majesty has done so.

BUT THE QUEEN IS NOT ALLOWED TO SIT ON A FOREIGN THRONE

Even if the throne is from the Seven Kingdoms.

THEY LEAVE THE TABLE DISCREETLY

If a royal must use the restroom during a meal, they don’t announce it to the table. Instead, they apparently simply say “Excuse me,” and that’s that. (If only your toddler would do the same.)

YOU MUST ADDRESS ROYALS PROPERLY

This one’s a little confusing. Apparently, when you first meet the queen, you should address her as “Your Majesty” and then “Ma'am.” For other female members of the royal family, you should use “Your Royal Highness,” and then again “Ma'am” in later conversation. For male royals, it's “Your Royal Highness” and then “Sir.” And under no circumstances should you address the queen as “Liz.”

THERE ARE NO AUTOGRAPHS OR SELFIES ALLOWED

So put that selfie stick away.

TIARAS ARE ONLY WORN BY MARRIED WOMEN

No ring? No tiara.

THEY RARELY EAT SHELLFISH

This isn’t a requirement, but a wise rule that many royals, including Queen Elizabeth, adhere to because of the increased likelihood of food poisoning. 

RELATED: YOU WON’T BELIEVE THE DELICIOUS FOODS THE QUEEN FORBIDS FROM THE ROYAL FAMILY’S DIET

CURTSIES ARE ENCOURAGED

While the official website for the British Monarchy says that there are “no obligatory codes of behaviour when meeting the queen or a member of the Royal Family,” it also states that many people wish to observe the traditional forms. That means a neck bow (from the head only) for men and a small curtsy for women.

WHEN THE QUEEN FINISHES EATING, THEN SO MUST YOU

Dining with royalty? No extra portions for you.

THE QUEEN SIGNALS WHEN A CONVERSATION IS OVER

If you see Her Majesty move her purse from her left arm to her right, then it’s time to stop talking. That apparently signals to her staff that she’s ready to move on.

SIX RAVENS MUST LIVE AT THE TOWER OF LONDON

According to legend, at least six ravens must remain at the giant fortress or else the monarchy will fall. But no one actually believes that, do they? Well, apparently so, since there are indeed seven (one spare) birds living at the Tower currently.

ROYAL WEDDING BOUQUETS CONTAIN MYRTLE

This tradition started with Queen Victoria and continued with the Duchess of Cambridge's marriage in 2011. This pretty flower symbolizes good luck in love and marriage. Aww...

RELATED: 14 OF THE MOST STUNNING ROYAL WEDDING DRESSES OF ALL TIME

THEY’RE NOT ALLOWED TO PLAY MONOPOLY

When the Duke of York was presented with the board game, he revealed that it’s forbidden in the royal household because “it gets too vicious.” Royals—they’re just like us.

RELATED: 8 INTERESTING FACTS YOU DIDN’T KNOW ABOUT KATE MIDDLETON’S KIDS

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And though it'll be very rare to see a royal sporting wedges, you'll never, ever see Meghan or Kate sporting the footwear around their grandmother-in-law Queen Elizabeth. Explained a source to Vanity Fair, "She really doesn’t like them and it’s well known among the women in the family.”

It's Liz's world, and we're just living in it. 

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