The IMO consists of an Assembly, a Council, and five Committees:
(1) Maritime Safety Committee (MSC) – the senior technical body responsible for all matters affecting maritime safety;
(2) the Marine Environment Protection Committee (MEPC) – responsible for the prevention and control of pollution from ships;
(3) the Legal Committee;
(4) the Facilitation Committee; and
(5) the Technical Cooperation Committee.
The organization, which is based in London, currently has 174 member states and three associate members. The Secretary-General, Kitack Lim, who is appointed by the Council and approved by the Assembly, heads the IMO Secretariat. He was elected for a four year term starting from 1 January 2016 and has been given a second four year term, starting January 2020.