Brunei
Brunei is currently examining the Treaty on the Prohibition of Nuclear Weapons (TPNW) with a view to ratifying it.
TPNW Status
| Key weapons of mass destruction treaties | ||
|---|---|---|
| NUCLEAR WEAPONS | ||
| Party to the TPNW | No (Signed 2018) | |
| Party to the NPT | Yes (Acceded 1985) | |
| Ratified the CTBT | Yes (Ratified 2013) | |
| Party to an NWFZ | Yes (Ratified 1996, Bangkok) | |
| CSA with the IAEA | Yes (In force 1987) | |
| AP with the IAEA | No | |
| BIOLOGICAL AND CHEMICAL WEAPONS | ||
| Party to the BWC | Yes (Acceded 1991) | |
| Party to the CWC | Yes (Ratified 1997) | |
| TPNW Art. 1(1) prohibitions: Compliance in 2025 | ||
|---|---|---|
| (a) | Develop, produce, manufacture, acquire | Compliant |
| Possess or stockpile | Compliant | |
| Test | Compliant | |
| (b) | Transfer | Compliant |
| (c) | Receive transfer or control | Compliant |
| (d) | Use | Compliant |
| Threaten to use | Compliant | |
| (e) | Assist, encourage or induce | Compliant |
| (f) | Seek or receive assistance | Compliant |
| (g) | Allow stationing, installation, deployment | Compliant |
| TPNW voting and participation | |
|---|---|
| UNGA resolution on TPNW (latest vote) | Voted yes (2025) |
| Participated in 3MSP (2025) | Yes (observer) |
| Participated in 2MSP (2023) | Yes (observer) |
| Participated in 1MSP (2022) | Yes (observer) |
| Average MSP delegation size (% women) | 1.67 (100%) |
| Adoption of TPNW (7 July 2017) | Voted yes |
| Participated in TPNW negotiations (2017) | Yes |
| Negotiation mandate (A/RES/71/258) | Voted yes |
| Fissile material | |
|---|---|
| Nuclear facilities | No |
| Fissile material production | No |
| HEU stocks | No |
| Plutonium stocks | No |
| SQP with the IAEA | Yes (Revised) |
Latest developments
Brunei attended the Third Meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons (TPNW) in March 2025 as an observer. It did not make a statement.
In the First Committee of the UN General Assembly in October 2025, Brunei reiterated its commitment to international treaties in the field of disarmament, including the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) and the TPNW. It also underlined the importance of nuclear-weapon-free zones ‘in strengthening security, building trust, and moving us closer to a nuclear-weapon-free world’.1
The Association of Southeast Asian Nations, of which Brunei is a member State, also addressed the Committee, recognizing ‘the historic significance of the TPNW and its contribution to the global nuclear disarmament and non-proliferation architecture’.2
Recommendations
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Brunei should urgently ratify the TPNW.
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Brunei should conclude and bring into force an Additional Protocol (AP) with the International Atomic Energy Agency (IAEA).