Prince Charles' wife Camilla Parker Bowles is poised to drop another etiquette peg down the royal pecking order when Prince William and Kate Middleton wed next spring, Breaking Celebrity News has learned.

A doctrine put in effect by the Queen stipulates that Camilla, the Duchess of Cornwall, will have to curtsy to Middleton, who is 35 years her junior!

The situation is complicated, largely hinging on who's present when the women are together: If William and Kate are in a room when Camilla is by herself, a curtsy would be expected from Camilla; if Charles and Camilla are in a room when Kate is by herself, a curtsy would be expected from Kate, one expert told UK newspaper Daily Mail.

In 2005, the Queen authored the private document, titled Entitled Precedence Of The Royal Family To Be Observed At Court, the year Camilla wed Prince Charles.

An ex-courtier said the move was a political gesture, made at the time to ease potentially uncomfortable exchanges between Camilla and Princess Anne and Princess Alexandra, both of whom had given "their adult lives to royal service and who saw no