International intergovernmental organizations granted observer status to WTO bodies
The purpose of observer status for international intergovernmental organizations in the WTO is to enable these organizations to follow discussions therein on matters of direct interest to them.
The guidelines on observer status for international organizations (WT/L/161, Annex 3) provide that requests for observer status from organizations shall not be considered for meetings of the Committee on Budget, Finance and Administration or the Dispute Settlement Body, therefore these bodies are not included in this list. Also not included are the Textiles Monitoring Body, which has no international intergovernmental organization observers, and Accession Working Parties.
https://www.wto.org/english/thewto_e/igo_obs_e.htm