Home1997 Treaties and Agreements ...Sao Tome and Principe (97-214) – Telecommunication Agreements Regarding Radio Transmissions Facilities hide Sao Tome and Principe (97-214) – Telecommunication Agreements Regarding Radio Transmissions Facilities TIAS Office of Treaty Affairs February 14, 1997 Telecommunication: Radio Transmissions Facilities Agreement signed at Sao Tome May 22, 1992; entered into force June 21, 1992. And addendum to agreement. Signed at Sao Tome February 14, 1997; entered into force February 14, 1997. Download attachment [998 KB] Tags Sao Tome and Principe Telecommunications Treaties