 While consultation on new guidelines is under way, the decision to fly the flag may be made by each government department.Previously the flag was generally only flown on public buildings on days marking the birthdays of members of the Royal Family, the wedding anniversary of the monarch, Commonwealth Day, Accession Day, Coronation Day, the Queen's Official Birthday, Remembrance Sunday, and on the days of the State Opening and prorogation of Parliament.The Union Flag is flown at half mast from the announcement of the death of the Sovereign (save for Proclamation Day), or upon command of the Sovereign.