According to royal rules, two direct heirs — William and George — should never fly on a plane together so that the lineage is protected in case of an accident. However, Prince William and Kate Middleton bent the rules during Prince George's first royal tour of Australia and New Zealand in April 2014.
While it's not technically royal protocol to wear weights in your skirts, it is a fashion hack Queen Elizabeth II follows to ensure her dress stays in place during official outings. Though Kate is known for her impeccable style, she has been victim to a gust of wind from time to time. During a tour of Canada in July 2011, Kate's dress got swept up in the wind as she arrived at Calgary Airport.
Royals usually don't take selfies or sign autographs, but even Kate has made a few exceptions. During Kate and Will's North American tour in July 2011, the duchess stopped to take a selfie in Slave Lake, Alberta.
The queen isn't too fond of wedged shoes, but that hasn't stopped Kate from wearing them time and time again. During her Canadian tour with William, Kate donned a pair of wedges when she boarded a Canadian Air Force jet at Yellowknife Airport in July 2011.
Even though there isn't technically a rule against showing PDA, royal couples usually refrain from hugging or holding hands during official appearances since they are serving as "working representatives of British monarchy." While Kate and Will are more discrete with their PDA, they have shared a few sweet moments together over the course of their relationship. Kate gave her man a subtle smooch as they celebrated William's win at the Foundation Polo Challenge in Santa Barbara, CA, in July 2011.