Home2023 Treaties and Agreements ...Sao Tome and Principe (23-526) – Extension and Amendment of Agreement for the Operation of Radio Transmission Facilities hide Sao Tome and Principe (23-526) – Extension and Amendment of Agreement for the Operation of Radio Transmission Facilities TIAS Office of Treaty Affairs May 26, 2023 Telecommunication: Radio Transmissions Facilities Signed at Sao Tome May 26, 2023; entered into force May 26, 2023. Extension of Agreement signed May 22, 1992: TIAS 97-214. Agreement previously extended and amended June 18, 2022: TIAS 22-618. Download Agreement [750 KB] Tags Sao Tome and Principe Telecommunications Treaties