Hello. some days ago I posted a thread asking help on how to know if my Airtronics Vanguard 4 channel radio radio was legal. Some users responded, and RCKEN even sent me a copy of the manual for that radio. Now, I purchased another Vanguard, this time is a six channel, however this one does not have the yellow sticker on it. Just for this reason must I assume that this radio has no legal frequencies? It is a 72 mhz FM on channel 53. If the yellow sticker only is not enough to know for sure, is there another way to know? I will appreciate your responses. Thanks!