Permanent Diplomacy Representatives and International Diplomatic Law Notes on International Public Law

Legal Foundations and the 1961 Vienna Convention

Diplomatic relations and the activities of permanent diplomatic representatives are grounded in long-standing international customs and traditions. The most significant written legal framework governing these relations is the $1961$ Vienna Convention on Diplomatic Relations. This convention was adopted unanimously at an international conference organized by the United Nations and largely codifies existing customary law, which facilitated its widespread acceptance among states. The Republic of Turkey became a party to this convention by approving it in the year $1984$.

Establishment and Termination of Diplomatic Missions

The establishment of a diplomatic mission between two states is not an automatic result of mutual recognition. Instead, it requires the mutual consent of both states as per Article $2$ of the Vienna Convention. States maintain full liberty in this regard, and the agreement may be implemented either through a formal treaty or via parallel national decisions following a verbal agreement. Conversely, the termination of diplomatic relations remains at the discretion of each state and can be triggered by a unilateral decision. The mission itself encompasses all diplomatic representatives and other employees sent by a state to the government of a foreign state.

Classification and Categories of Diplomatic Personnel

According to Article $1$ of the $1961$ Vienna Convention, the term "diplomatic agent" includes both the head of the mission and all members of the mission holding a diplomatic rank. The mission staff is divided into four distinct categories: the Head of Mission, Diplomatic Personnel, Administrative and Technical Personnel, and Service Personnel. Diplomatic personnel typically consist of career foreign service officers and certain officials from other ministries. Administrative and technical staff include members like secretaries and technicians who do not hold diplomatic status but perform essential functions. Service staff includes categories such as cooks, gardeners, guards, drivers, and maids. Mission buildings are defined as the buildings, parts of buildings, and associated land used for mission purposes, including the residence of the head of the mission, regardless of ownership status.

The Hierarchy and Classes of Mission Chiefs

Under Article $11$ and Article $15$, mission chiefs are categorized into three distinct classes based on their accreditation level. The first class includes Ambassadors and Papal Nuncios (nonce) accredited to Heads of State, as well as other mission chiefs of equivalent rank. The second class consists of Envoys, Ministers, and Papal Internuncios accredited to Heads of State. The third class comprises Chargé d'affaires accredited to Ministers of Foreign Affairs. While an Ambassador personally represents their Head of State and maintains the privilege of meeting the host country's Head of State, a Chargé d'affaires may either be a permanent head of mission of that rank or a "Chargé d'affaires ad interim" who temporarily manages the mission in the absence of the permanent chief as per Article $19$.

Appointment Procedures and Credentials

The appointment of a mission chief involves several formal steps. First, the sending state must obtain "Agrément" (Agreman), which is the explicit consent of the receiving state for a specific individual. The receiving state is not obligated to provide reasons for refusing an agrément (Article $4/2$). In Turkey, the Head of Mission is appointed by the President based on Article $104$ of the Constitution, Law No. $1173$, and Presidential Decree No. $1$. Once appointed, the representative presents a Letter of Credence (itimatname), which is a formal document from one Head of State to another certifying the representative's authority. For the Chargé d'affaires class, this letter is exchanged between Foreign Ministers. According to Article $13$, a mission chief is considered to have commenced their duties once they present their credentials or notify their arrival and submit a copy of their credentials to the Foreign Ministry.

The Diplomatic Corps (Kordiplomatik) and the Doyen

The Diplomatic Corps refers to the collective group of foreign diplomatic representatives permanently stationed in a country. Although it lacks legal personality and is not regulated by the $1961$ Vienna Convention, it serves two primary functions: representing all foreign states at formal ceremonies (protocol) and protecting the common rights and privileges of diplomatic representatives. This group is led by the "Doyen" (Dean). Priority is determined by the date and time the mission chief assumed their duties (Article $16$), so the Doyen is usually the longest-serving mission chief in that country. In Catholic countries, the Papal Nuncio is traditionally accepted as the Doyen regardless of his start date. International law allows each state to determine its own practice regarding the selection of the Doyen.

Staffing Regulations and Joint Representation

Under Article $11$, the receiving state may require that the size of a mission be kept within limits it considers reasonable and normal, considering local conditions and mission needs, unless a specific agreement exists. The receiving state may also refuse to accept certain categories of officials without discrimination. Articles $5$ and $6$ allow for joint representation: a sending state can accredit one mission chief to multiple states unless there is an objection, and multiple states may accredit the same person to a third state. A mission member can also represent the sending state at international organizations.

Functions and Limitations of Diplomatic Missions

As specified in Article $3$, the primary functions of diplomatic representatives are negotiation, observation of conditions in the receiving state, and the protection of the interests of the sending state and its nationals. In some cases, diplomatic missions may perform consular functions where no separate consulate exists. However, mission members must respect local laws and regulations without prejudice to their immunities (Article $41/1$), refrain from interfering in internal affairs, and conduct all official business through the receiving state's Ministry of Foreign Affairs. Mission premises must not be used in ways incompatible with diplomatic functions, and representatives are prohibited from engaging in professional or commercial activities for personal gain (Article $42$).

Inviolability of Premises, Archives, and Communication

Article $22$ grants mission premises absolute inviolability; local authorities may not enter without the mission chief's consent. The receiving state also has a special duty to take all necessary steps to protect the premises against intrusion, damage, or disturbance of peace. Assets, furniture, and transport means are immune from search, seizure, attachment, or execution. Similarly, under Article $24$, mission archives and documents are inviolable at all times and locations. Communication is further protected by Article $27$, allowing the mission to use all appropriate means, including diplomatic couriers and coded messages, though wireless transmitters require local consent. The diplomatic bag cannot be opened or detained; it must bear visible external markings and only contain diplomatic documents or official items.

Personal Inviolability and Jurisdictional Immunities

Diplomatic agents enjoy personal inviolability under Article $29$, meaning they cannot be arrested or detained. The receiving state must treat them with respect and prevent any attack on their person, freedom, or dignity. Article $30$ extends this protection to the agent's private residence and documents. Regarding legal proceedings, Article $31$ provides absolute immunity from the criminal jurisdiction of the receiving state. Immunity from civil and administrative jurisdiction is also granted except in three specific scenarios: cases regarding private real estate not held on behalf of the sending state, cases involving succession where the agent is a private executor or heir, and cases related to any professional or commercial activity conducted outside official duties. A diplomatic agent is not required to give evidence as a witness.

Removal of Immunity and Social Security Exemptions

Immunity from jurisdiction may be waived, but this must always be done expressly by the sending state (Article $32$). If a diplomatic agent initiates legal proceedings, they lose the right to claim immunity against corresponding counterclaims. Notably, a waiver of immunity for a civil or administrative case does not automatically imply a waiver for the execution of the judgment; a separate waiver is required for execution. Regarding social security, Article $33$ exempts diplomatic agents from local social security laws for services rendered to the sending state. This exemption applies to their private servants if they are not nationals/residents of the host state and are covered by another state's system.

Tax and Customs Privileges

Article $23$ exempts the sending state and the head of mission from all national, regional, or municipal taxes regarding mission premises, except for payments for specific services. Article $28$ exempts official fees and charges collected by the mission. Under Article $34$, diplomatic agents are exempt from personal or real taxes, with exceptions for indirect taxes included in prices, private real estate taxes, estate/inheritance taxes (with some exceptions), taxes on private income from the host state, and certain registration or mortgage fees. Article $36$ mandates the entry of goods for official mission use and personal use of the agent (including their family) free of customs duties. Personal baggage is usually exempt from inspection unless there are serious grounds to suspect it contains prohibited or quarantined items, in which case inspection must happen in the presence of the agent.

Persona Non Grata and Termination Procedures

Under Article $9$, the receiving state may at any time declare a mission chief or any diplomatic staff member as "Persona Non Grata" (an unwanted person) or declare any other member unacceptable without needing to explain its reasons. The sending state must then recall the person or terminate their functions. Failure to do so within a reasonable time allows the receiving state to stop recognizing the individual as a mission member. Even in the event of armed conflict, Article $44$ requires the host state to facilitate the departure of mission members and their families. Article $45$ stipulates that if diplomatic relations are severed or a mission is withdrawn, the host state must continue to respect and protect mission premises, property, and archives. The sending state may entrust the custody of these assets or the protection of its interests to a third state acceptable to the host state.

Scope and Duration of Privileges

Privileges and immunities begin the moment a person enters the host state's territory to take up their post or when their appointment is notified if they are already present (Article $39$). These rights normally end when the person leaves the country or after the expiry of a reasonable period given for departure. However, immunity continues indefinitely for acts performed in the exercise of official functions. Article $37$ extends these protections to family members living with the agent (if they are not host state nationals). Administrative, technical, and service staff also receive specific, more limited sets of immunities depending on their nationality and residence status. Furthermore, Article $40$ requires third states to grant diplomatic agents in transit the same inviolability and protections necessary to ensure their passage or return.

Theoretical Background for Immunities

There are three primary legal theories developed to explain the basis of diplomatic privileges and immunities:

1. Exterritoriality Theory (Ülke Dışılık Kuramı): The fictional idea that the mission premises are an extension of the sending state's territory.
2. Representation Theory (Temsil Kuramı): The idea that the agent represents the person and sovereignty of the sending state.
3. Functional Approach (İşlevsel Yaklaşım): The modern view that immunities are granted to ensure the efficient performance of the mission's functions on behalf of the state.