This 2nd edition contains the Constitution of the International Organization for Migration, the Rules of Procedure of the Council, the Terms of Reference of the Standing Committee of Programmes and Finance (SCPF), the Rules of Procedure for the SCPF and the  Agreement concerning the Relationship between the International Organization for Migration and the United Nations signed on 19 September 2016, whereby IOM became a member of the United Nations System.

The IOM Constitution provides a framework for the purposes, functions, legal status, finance, membership and other issues necessary for the functioning of the Organization. The present text incorporates into the Constitution of 19 October 1953 of the Intergovernmental Committee for European Migration (former designation of the Organization), which entered into force on 30 November 1954, the amendments adopted on 20 May 1987 by the 55th Session of the Council (Resolution no. 724), which entered into force on 14 November 1989, and the amendments adopted on 24 November 1998 by the 76th Session of the Council (Resolution No. 997), which entered into force on 21 November 2013.