Kate must always curtsy to only two Royal Family members.

Kate, the Princess of Wales, follows strict curtsying rules.

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If members of the same rank are styled as His or Her Royal Highness, they do not have to curtsy to each other.

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Royals need to show respect to King Charles III or Queen Consort.

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The Duke and Duchess of Edinburgh have to curtsy to the King and Queen Consort.

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Kate does not have to curtsy again to the King and Queen Consort if their paths have already met that day.

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Without her husband, Kate must curtsy to other family members.

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Princess Beatrice and Princess Eugenie are "princesses of the blood."

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These rules are part of royal etiquette and protocol.

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