Nice rig.
I'll be honest with you'all I didn't read all the posts, got to the second post and thought....Oooops.
So, correction. A HAM license is applicable any time a licensee fires up ANY radio.
Terms of holding any class of a HAM license authorizes the licensee to operate on the assigned frequencies in modes authorized in that class. However, a violation of FCC regulations can occur at any frequency, in any band, in any mode.
Same holds true for any other licenses, GRMS, CB, Marine, Aviation, Business or even General Broadcast, your license grants authority to use the designated bands and frequencies under power restrictions assigned for that license. The only one who can transmit on any frequency at any power level is God himself!
You can lose any and all license(s) and be subject to fines or penalties for violating ANY FCC regulation.
Operating out of band means any band the operator is not licensed for. If you violate FCC regulations with any radio you can lose both licenses, as in ALL privileges, not just those applicable to a band or frequency subject of the violation, like transmitting 50 watts with your HAM rig on GRMS freqs.
A HAM license allows operators to build their own radios but they are responsible for compliance, no other FCC license allows operators to modify or build any transmitter. Exception for licensing individuals is for commercial repair/manufacturing engineers and military operators under certain conditions. That means GRMS, CB, Aviation, Marine, Business and all Government band operators must use off the shelf commercial radios, no modifications allowed.
Commercial radios today are locked out of unauthorized frequencies and at transmitting at power levels as authorized within a band. You can get bad radios that don't operate as intended, if you have one the screw up is on the operator, not the guy in China who built it. There are commercial radios that will receive a greater spectrum than they will transmit on. You can listen to Broadcast FM on a HAM rig but it isn't designed to transmit on that band.
Lastly, violations, probably the most common was operators using power amplifiers when power limitations applied to a band, most likely CBer's with amps. When you hear a CB trucker that pins your S meter and they say they are 60 miles away, they are probably cheating. Remember, when you have power options you are only to use that power necessary to facilitate communications and in compliance with applicable power limitations.