The ITPS is composed of 27 top soil experts representing all world regions. From 2013-2018, the ITPS revised the World Soil Charter, published the Status of the World's Soil Resources report, and developed the Voluntary Guidelines for Sustainable Soil Management. Looking ahead, the ITPS will contribute to GSP implementation plans, update the soil resources report by 2025, and organize a symposium on soil pollution in 2018. The ITPS membership is renewed every three years, with approximately half of members replaced.