Invitations have been sent to the following categories of entities entitled to participate (ref. CV/Art. 23):

Member States [CV/268]
CL-25/47: Invitation of behalf of the Government of Qatar
CL-25/48: Important information for the preparation of the Conference
Palestine [Res. 99 (Rev. Dubai, 2018)]
DM-25/1007 Observer Organizations by virtue of CV Nos 269A, 269B, 269D:
the United Nations and its specialized agencies
the International Atomic Energy Agency
regional telecommunication organizations mentioned in Article 43 of the Constitution
DM-25/1006:
ITU Sector Members by virtue of CV Nos 229 and 231
Observer Organizations by virtue of CV/269C (Intergovernmental organizations operating satellite systems)