Home2009 Treaties and Agreements ...Mexico (09-901) – Protocol Concerning the Use of Radio Frequencies By Certain Fixed Terrestrial Links Constituting a Cross Border Public Security Communications Network Along the Common Border hide Mexico (09-901) – Protocol Concerning the Use of Radio Frequencies By Certain Fixed Terrestrial Links Constituting a Cross Border Public Security Communications Network Along the Common Border TIAS Office of Treaty Affairs September 1, 2009 Telecommunication: Radio Frequencies Protocol signed at Washington and Mexico City August 31 and September 1, 2009; entered into force September 1, 2009. Download attachment [448 KB] Tags International Law, Treaties, and Agreements Mexico Telecommunications