A joint declaration is a diplomatic instrument through which two or more parties—typically states, but sometimes international organizations or non-state actors—publicly articulate a common stance, set of principles, or planned actions. Unlike a treaty, a joint declaration is generally not legally binding under international law, though it can carry significant political weight and, in some cases, create legitimate expectations or evolve into binding obligations through state practice.
Joint declarations are commonly produced at the conclusion of bilateral summits, multilateral conferences, or working visits. They typically cover areas such as security cooperation, trade, climate policy, human rights, or the resolution of disputes. Their language is negotiated carefully, with phrases like "the parties affirm" or "intend to cooperate" signalling political rather than legal commitment.
Some joint declarations have nonetheless produced concrete legal consequences. The Sino-British Joint Declaration of 19 December 1984, signed by Margaret Thatcher and Zhao Ziyang, was registered with the United Nations as a treaty and set out the terms for the 1997 handover of Hong Kong, including the "one country, two systems" framework. Similarly, the Japan–Soviet Joint Declaration of 1956 formally ended the state of war between the two countries and restored diplomatic relations.
Other prominent examples are largely political in character: the Abraham Accords Declaration (2020) accompanying the normalization agreements between Israel, the UAE, and Bahrain; the various G7 and G20 leaders' declarations issued after annual summits; and the EU–China Joint Declarations on climate change.
For researchers, the key analytical questions when examining a joint declaration are:
- Is it registered as a treaty under Article 102 of the UN Charter?
- Does the text use binding ("shall," "agree") or hortatory ("intend," "endeavour") language?
- What domestic ratification or follow-up mechanisms, if any, are referenced?
- How have the parties subsequently behaved—has practice reinforced or eroded the declaration's authority?
Example
In December 1984, the United Kingdom and the People's Republic of China signed the Sino-British Joint Declaration setting out the terms for transferring sovereignty over Hong Kong on 1 July 1997.
Frequently asked questions
Usually no—most joint declarations are political commitments. However, some, like the 1984 Sino-British Joint Declaration, are registered as treaties with the UN and create binding obligations under international law.
Keep learning