The rank of a diplomatic agent is a mark of dignity and honor particularly of consequence in matters of etiquette and ceremonial. Reciprocity between states is the general rule in the grade of agents. The old theory that agents of the first rank had access to the ear of the sovereign is no longer held, and all grades alike represent both the sovereign and the state from which they come.
[§ 71. Suite]
The personnel of a mission may be distinguished as the official and the non-official.
(a) The official suite consists of the functionaries, and varies in number according to the dignity and importance of the mission. Formerly the number was scrutinized with great care, owing to the fear that a numerous suite might endanger the safety of the receiving state. The official suite may include, (1) the counsel to the mission, (2) the secretaries, (3) the attachés, military, naval, and others, (4) the interpreters and dragomans, (5) the clerks and accountants, (6) the couriers, (7) the chaplain, (8) the doctor, and in some instances other officers necessary for the performance of the official functions.
(b) The non-official suite includes the family of the diplomatic agent and those in his household employ. This may include, beside his immediate family, (1) the private chaplain, (2) the private doctor, (3) the private secretaries, (4) the domestic servants of various grades.
[§ 72. Who may send Diplomatic Agents]
It is the general rule that sovereign states only may send ambassadors or other diplomatic agents. Sometimes diplomatic relations are maintained between states when both are not fully sovereign, as in the relations between Bavaria, a member of the German Empire, and France. In general, where the sovereignty of a state is not complete, its right of legation is fixed by the treaty which impairs its sovereignty. A state which has not full sovereign powers may have a partial right of legation, either active or passive, or a right to send diplomatic agents with limited functions.
The sending of a diplomatic agent is essentially an act of the sovereign person, whether he be a monarch, president, council, or have other title. The domestic law determines who this person shall be. International law makes no distinction.
In each state a department, usually called the department of foreign affairs, has the business of international intercourse in charge. The organization of this department and the general methods are matters of domestic law. All foreign states need to know is to what extent this department is competent to carry on negotiations.