 On 26 September 2013 the UN Security Council passed Resolution 2117, which urged nations to remain committed to small arms embargoes and SALW control protocols.Work on SALW via the United Nations is coordinated by the Office for Disarmament Affairs (UNODA), though the UN Coordinating Action on Small Arms (CASA) mechanism, which comprises 21 UN departments and agencies working on different aspects of small arms and light weapons control.The United Nations Institute for Disarmament Research (UNIDIR), carries out research in arms control affairs and has published many articles and books related to small arms and light weapons.