On Wednesday, the United Kingdom gets a new Prime Minister and depending who it is, Queen Elizabeth II may be forced to break royal protocol.

The protocol in question states, according to Express, that unmarried couples who are guests of the Queen at any of her residences are not permitted to stay overnight. Previously, Prince Harry and Meghan Markle had to follow this protocol before their royal wedding, however, if Prime Minister candidate Boris Johnson gets elected, the Queen may have to make an exception for him and his partner Carrie Symonds as they are not legally married.

Johnson is up against Jeremy Hunt for the head of government position currently held by Theresa May with the new Prime Minister to be announced on Tuesday. Whoever wins the election will likely be invited to the Queen's Highlands estate in the fall for an overnight stay, and this is where protocol could potentially be broken.

If Queen Elizabeth II were to bend the rules for Johnson, it wouldn't be the first time she has done so. She previously broke protocol following the death of Princess Diana. She isn't the only one who has broken the rules, though. Duchess Kate Middleton deviated from royal protocol when her "killer legs" were exposed and Duchess Meghan Markle's done her fair share of "angering" the palace by embracing her American roots.

In the end, if Queen Elizabeth II does end up making an exception for the potential new Prime Minister, she won't likely face any consequences. She is the Queen, after all.

Queen Elizabeth II
Queen Elizabeth II is seen at the Chichester Theatre while visiting West Sussex on Nov. 30, 2017, in Chichester, United Kingdom. Getty Images/Stuart C. Wilson