citizens band radio general mobile radio service i s m radio band family radio service united states national radio quiet zone p m r446 citizens broadband radio service multi- use radio service title 47 c f r part 15 communications act of 1934 business band general radiotelephone operator license federal radio commission radio act of 1927 bandwidth allocation amateur radio international operation unlicensed personal communications services regulation of radio broadcast in the united states public radio service short range certificate
Mass media_Mass media regulation