Prince Harry and Meghan will no longer use their HRH titles and will not receive public funds for royal duties, Buckingham Palace has announced.
The couple will also no longer formally represent The Queen.
The palace made the announcement in an official statement that read in parts: "The Duke and Duchess of Sussex are grateful to Her Majesty and the Royal Family for their ongoing support as they embark on the next chapter of their lives.
"As agreed in this new arrangement, they understand that they are required to step back from Royal duties, including official military appointments. They will no longer receive public funds for Royal duties."
The Sussexes will not use their HRH titles as they are no longer working members of the royal family.
The statement continued: "The Duke and Duchess of Sussex have shared their wish to repay Sovereign Grant expenditure for the refurbishment of Frogmore Cottage, which will remain their UK family home.
The palace said it would not comment on what security arrangements would be in place for the royal couple.
Their new website, sussexroyal.com, has been updated following the Queen's statement.
"In line with the statement by Her Majesty The Queen, information on the roles and work of the Duke and Duchess of Sussex will be updated on this website in due course," it said.
This new model will take effect in the Spring of 2020.
The announcement marks the conclusion of talks about the couple's future with senior members of the family and royal aides.