«The International Union of Geodesy and Geophysics (IUGG) is the international organization dedicated to advancing, promoting, and communicating knowledge f the Earth system, its space environment, and the dynamical processes causing change.
Through its constituent Associations, Commissions, and services, IUGG convenes international assemblies and workshops, undertakes research, assembles observations, gains insights, coordinates activities, liaises with other scientific bodies, plays an advocacy role, contributes to education, and works to expand capabilities and participation worldwide.
According to Statute 4d: «There shall be a category of adherence known as Affiliate Membership. Any multi-national or regional geodetic, geophysical or other geosciences organization shall be eligible for Affiliate Membership. Affiliate Members shall have the same rights, duties and obligations as Associate Members.» Affiliates do not pay an annual contribution to the Union (Statute 12d).»
Source: IUGG website.
The figure (from the IUGG website) indicates that, besides IAGETH, the following organizations were also approved as Affiliate Members in 2014: