After Charles remarried, the Queen changed the Order of Precedence “on blood principles” so that neither Princess Anne nor Princess Alexandra, granddaughter of George V, would have to curtsy to Camilla when her husband was not present. The new rules also state that Duchess Kate - when she is not accompanied by Prince William - must curtsy to Princess Anne, Princess Alexandra, Beatrice and Eugenie. When William is with her, Kate doesn't curtsey to anyone but the Queen, Philip, Charles & Camilla.