In accordance with Article 25 of the ITU Convention, the following shall be admitted to the Radiocommunication Assembly 2023:​

​Delegations of Member States​;

State of Palestine [Res 99 (Rev. Dubai, 2018);

Representatives of Sector Members concerned;

Observers, to participate in an advisory capacity, from:
the organizations and agencies referred to in Nos. 269A to 269D of the ITU Convention;
any other regional organization or other international organization dealing with matters of interest to the Radiocommunication Assembly.

Finally, pursuant to resolves 4 of Resolution 169 (Rev. Bucharest, 2022), Academia¹ shall also be admitted to the Radiocommunication Assembly 2023, as an observer in a non-advisory capacity. 

In accordance with Article 33 of the ITU c​onvention, CV/476:​

“…The organizations referred to in Nos. 269A to 269E of this Convention and other organizations also specified in Chapter II thereof (unless they have been exempted by the Council, subject to reciprocity) and Sector Members referred to in No. 230 of this Convention which participate, in accordance with the provisions of this Conv​ention, in a plenipotentiary conference, in a conference, assembly or meeting of a Sector of the Union, or in a world conference on international telecommunications, shall share in defraying the expenses of the conferences, assemblies and meetings in which they participate on the basis of the cost of these conferences and meetings and in accordance with the Financial Regulations. Nevertheless, ​Sector Members will not be charged separately for their attendance at a conference, assembly or meeting of their respective Sectors, except in the case of regional radiocommunication conferences. …” 

¹ This includes colleges, institutes, universities and their associated research establishments concerned with the development of telecommunications/ICT.