RES207 – 277 – 4 Regional HF monitoring and direction-finding facilities Collaboration and cooperation between regional administrations to coordinate the use of monitoring and direction-finding facilities. 5 Transmission of warning messages Transmission of multilanguage warning messages on specific channels affected by strong or persistent interference. Such transmissions should be conducted after coordination with the users of the affected services and the administration(s) or competent authorities concerned. 6 Education and publicity initiatives Administrations should provide education and publicity initiatives on the proper use of the radio-frequency spectrum in these frequency bands.