---
title: "Protocol, Precedence & Diplomatic Immunity Rules"
description: "Grasp the legal architecture of diplomatic and consular relations: the VCDR and VCCR, precedence rules, inviolability and the categories of immunity clearly."
url: "https://modeldiplomat.com/learn/lessons/exam-diplomacy-statecraft-protocol-precedence-diplomatic-immunity-vcdr-vccr"
---

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Protocol, precedence & diplomatic immunity (VCDR/VCCR)

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# Protocol, precedence & diplomatic immunity (VCDR/VCCR)

The legal architecture of diplomatic and consular relations: VCDR 1961, VCCR 1963, precedence rules, inviolability and the categories of immunity.

## The two governing treaties

Diplomatic and consular relations rest on two codifying conventions drafted by the International Law Commission and adopted at Vienna. The **Vienna Convention on Diplomatic Relations (VCDR), 18 April 1961**, entered into force on 24 April 1964 and governs permanent diplomatic missions. The **Vienna Convention on Consular Relations (VCCR), 24 April 1963**, entered into force on 19 March 1967 and governs consular posts. Both are near-universally ratified (over 190 states parties), and the International Court of Justice has repeatedly treated their core provisions as customary international law, most authoritatively in *United States Diplomatic and Consular Staff in Tehran (USA v. Iran)*, judgment of 24 May 1980, which described the diplomatic immunities regime as a 'self-contained' system.

## Establishment, agrément and persona non grata

Under VCDR Article 2, diplomatic relations are established by mutual consent. The sending state proposes a head of mission; the receiving state must grant **agrément** before appointment (Article 4), and may decline without giving reasons. The mission's functions are enumerated in Article 3: representing the sending state, protecting its interests and nationals, negotiating, reporting by lawful means, and promoting friendly relations.

The decisive safety valve is **persona non grata** (Article 9): the receiving state may at any time, without explanation, declare any member of the mission unacceptable, whereupon the sending state must recall the person or terminate their functions. This is the standard instrument for managing espionage and reciprocal expulsions — exercised en masse, for example, in the coordinated Western expulsion of more than 150 Russian diplomats in March 2018 following the Salisbury (Skripal) poisoning, and again after the February 2022 invasion of Ukraine.

## Inviolability of premises and the diplomatic bag

VCDR Article 22 makes mission premises **inviolable**: agents of the receiving state may not enter without the head of mission's consent, and the receiving state bears a special duty to protect the premises against intrusion or damage. Article 24 makes archives and documents inviolable at all times. Article 27 protects free communication and declares the **diplomatic bag** inviolable — it may not be opened or detained — while the diplomatic courier enjoys personal inviolability. The contested 1984 attempt by the United Kingdom not to open the Libyan 'diplomatic bag' after the shooting of WPC Yvonne Fletcher from the Libyan People's Bureau illustrated the rule's rigidity: London severed relations and allowed the personnel to depart rather than breach Article 27.

Consular premises enjoy a narrower, qualified inviolability under **VCCR Article 31**: consent to enter is presumed in the case of fire or other disaster requiring prompt protective action. This text-level asymmetry — absolute for diplomatic missions, qualified for consular posts — is a recurring distinction examiners probe.

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