The United Nations common system is understood as common standards, methods and arrangements being applied to salaries, allowances and benefits for the staff of the United Nations system. The common system is designed to avoid serious discrepancies in terms and conditions of employment, to avoid competition in recruitment of personnel and to facilitate the interchange of personnel among common system organizations.

The conditions of service in the common system is regulated by the International Civil Service Commission (ICSC), while co-ordination amongst common system entities take place through United Nations System Chief Executives Board for Coordination (CEB), under the chairmanship of the UN Secretary-General. 

A list of UN common system members can be found on the ICSC website here.

NoOrganization or AgencyStaff Rules and / or Regulations
1United Nations secretariat
2International Labor Nations (ILO)
3Food and Agriculture Organization (FAO)
4The United Nations Educational, Scietific and Cultural Organization (UNESCO)
5International Civil Aviation Organzation (ICAO)
6World Health Organization (WHO)
7World Bank Group
8International Monetary Fund (IMF)
9Universal Postal Union (UPU)
10International Telecommunication Union (ITU)
11World Meteorological Organization (WMO)Page 109:
12International Maritime Organization (IMO)
13World Intellectual Property Organization (WIPO)
14International Fund for Agricultural Development (IFAD)
15United Nations Industrial Development Organization (UNIDO)
16UN World Tourism Organization (UNWTO)
17International Atomic Energy Agency (IAEA)
18World Trade Organization (WTO)
19International Organization for Migration (IOM)
20UN Conference on Trade and Development (UNCTAD)
21UN Development Programme (UNDP)
22UN Environment Programme (UNEP)
23UN High Commissioner for Refugees (UNHCR)
24UN Relief and Works Agency (UNRWA)
25UN Children's Fund (UNICEF)
26UN Population Fund (UNFPA)
27World Food Programme (WFP)
31UN Office for Project Services (UNOPS)'s_bulletins/2009/sgb__2009-__1__[authority_of_unops_in_matters_relating_to_hr_management].doc






Read more about the UN Common System on the website of International Civil Service Commission, UN Office of Human Resources 

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