Skip to main content

Sierra Leone

In the First Committee of the UN General Assembly in October 2023, Sierra Leone noted its recent signature of the TPNW and welcomed the Treaty’s entry into force. It described the TPNW as ‘a complementary instrument to the NPT’ and expressed its hope that it would help to bring an end to the ‘long impasse in multilateral nuclear disarmament negotiations’. ‘It is time to take a new and comprehensive approach towards nuclear disarmament,’ it said.[1]

TPNW Status

22 Sep 2022
TPNW Article 1(1) prohibitions: Compliance in 2023
(a) Develop, produce, manufacture, acquire Compliant
Test Compliant
Possess or stockpile 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 (2023)
Participated in 2MSP (2023) Yes (observer)
1MSP delegation size (% women) 2 (0%)
Adoption of TPNW (7 July 2017) Voted yes
Participated in TPNW negotiations (2017) Yes
Negotiation mandate (A/RES/71/258) Voted yes
Other weapons of mass destruction (WMD) treaties
Party to an NWFZ No (Signed 1996, Pelindaba)
Party to the NPT Yes (Acceded 1975)
Ratified the CTBT Yes (Ratified 2001)
Party to the BWC Yes (Ratified 1976)
Party to the CWC Yes (Ratified 2004)
IAEA safeguards and fissile material
Safeguards agreement Yes (4 Dec 2009)
TPNW Art 3(2) deadline N/A
Small Quantities Protocol Yes (Modified)
Additional Protocol No (Signed 2022)
Enrichment facilities/reprocessing plants No
HEU stocks No
Plutonium stocks No

Latest developments

Sierra Leone observed the Second Meeting of States Parties to the TPNW (2MSP) in November and December 2023. ‘As a signatory to the TPNW, we underscore the importance of this historic Treaty in addressing the humanitarian consequences of nuclear weapons,’ it said. ‘Sierra Leone applauds the collective commitment demonstrated by States parties in taking this bold step towards a world free from the threat of nuclear weapons.’ It expressed its firm belief that the complete prohibition of nuclear weapons is ‘essential to attain global peace, security and sustainable development’, and emphasised ‘the moral imperative to prevent the devastating impact of nuclear weapons on humanity and the environment’. It also said that it looked forward ‘to working with all States to support the Treaty’s implementation and universalisation’.2

Sierra Leone was one of the co-sponsors for the 2023 UN General Assembly resolution on the TPNW, which called upon ‘all States that have not yet done so to sign, ratify, accept, approve or accede to the Treaty at the earliest possible date’.3 In January 2023, Sierra Leone participated in an African regional seminar on universalisation of the TPNW in Pretoria, hosted by the South African foreign ministry.4


  • Sierra Leone should urgently ratify the TPNW.

  • Sierra Leone should bring into force its Additional Protocol with the IAEA, and upgrade to a Modified Small Quantities Protocol.

  • Sierra Leone should ratify the Pelindaba NWFZ Treaty, which it signed in 1996.

Can you help us update this state profile? Send e-mail
Did you find this interesting?
Print state profile