1911 Encyclopædia Britannica, Volume 5… (1911)
“ Chargés d’affaires per interim, or chargés des affaires, are those who are presented as such, either verbally or in writing, by heads of missions of the first, second or third rank to the minister for foreign affairs of the state to which they are accredited, when they leave their post temporarily, or pending the arrival of their successor. It is usual to appoint a counsellor or secretary of legation chargé d’affaires. Some governments are accustomed to give the title of minister to such chargés d’affaires, which ranks them with the other heads of legation. ”
