Section 6
SEC. 6. The grantee shall have the right at its terminals and landing fields, as it is allowed to use under Section 5 hereof, as well as in its aircraft, to construct, operate and maintain stations or transmitting sets for wireless telegraphy and direction findings, and other radio aids to air navigation using wavelengths or frequencies in accordance with the rules and regulations made by the government: Provided, however, that the wireless communication facilities shall be used solely for receiving and transmitting weather forecasts and messages relating to the grantee's aircraft and other matters in connection with the grantee's services.