Fcc 47 cfr 15 subpart b class a July 8, 2019 16 32 64 128 Fcc cfr title 47 part 15 subpart b class a 47 cfr fcc part 15 subpart b class a Fcc cfr47 part 15.249 Fcc 47 cfr part 15 subpart c Fcc 47 cfr fcc part 15 subpart b
