| 1. | Convention relating to the distribution of programme-carrying signals transmitted by satellite. Brussels, 21 May 1974 | 25 | 1 | | XXV | | 474 | Convention relating to the distribution of programme-carrying signals transmitted by satellite | XXV-1 |
| 2. | Constitution of the Asia-Pacific Telecommunity. Bangkok, 27 March 1976 | 25 | 2 | | XXV | | 475 | Constitution of the Asia-Pacific Telecommunity | XXV-2 |
| 2.a. | Amendment to article 11, paragraph 2 (a), of the Constitution of the Asia-Pacific Telecommunity. Bangkok, 13 November 1981 | 25 | 2 | a | XXV | | 476 | Amendment to article 11, paragraph 2 (a), of the Constitution of the Asia-Pacific Telecommunity | XXV-2-a |
| 2.b. | Amendments to articles 3 (5) and 9 (8) of the Constitution of the Asia-Pacific telecommunity. Colombo, 29 November 1991 | 25 | 2 | b | XXV | | 477 | Amendments to articles 3 (5) and 9 (8) of the Constitution of the Asia-Pacific telecommunity | XXV-2-b |
| 2.c. | Amendments to the Constitution of the Asia-Pacific Telecommunity. New Delhi, 23 October 2002 | 25 | 2 | c | XXV | | 478 | Amendments to the Constitution of the Asia-Pacific Telecommunity | XXV-2-c |
| 3. | Agreement establishing the Asia-Pacific Institute for Broadcasting Development. Kuala Lumpur, 12 August 1977 | 25 | 3 | | XXV | | 479 | Agreement establishing the Asia-Pacific Institute for Broadcasting Development | XXV-3 |
| 3.a. | Amendments to the Agreement establishing the Asia-Pacific Institute for Broadcasting Development. Islamabad, 21 July 1999 | 25 | 3 | a | XXV | | 480 | Amendments to the Agreement establishing the Asia-Pacific Institute for Broadcasting Development | XXV-3-a |
| 4. | Tampere Convention on the Provision of Telecommunication Resources for Disaster Mitigation and Relief Operations. Tampere, 18 June 1998 | 25 | 4 | | XXV | | 481 | Tampere Convention on the Provision of Telecommunication Resources for Disaster Mitigation and Relief Operations | XXV-4 |