Hmmmm.... I thought I had said my say on this subject, but it got it's hook into me...
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That said, I can sense a simmering heat of emotions just below the surface.. this is a very emotion-charged subject, this Part 97.403. And so saying, I decided to go to the people that could answer this best, at least for me...so this morning I called my contact at the FCC.
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I won't elaborate on details, but I have had a relationship with the FCC for quite awhile... for thou my work doesn't involve FCC administer'd frequencies, often our signals cross boundaries- the net result- I have gotten know some of their people quite well, over the years.
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Fast forward thru the day, I called my friend, one of their Field Engineers-----
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"Okay Lauri, what trouble are you thinking of getting into now?"
"This deals with amateur radio"
"And how do you want to torment the poor hams now?" *
"Actually, I don't--at least not this time*.... what can you tell me about Part 97 decimal 403?"
"What is that? Part 97 dot 403.... let me get back to you......................."
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Later this afternoon he calls back
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"I read that regulation" he said "now, what do you want to know about it?"
I filled him in on this discussion
"and your question is......?"
So I said my interpretation of it is: That in the event of an emergency, anyone can use any radio in any way to effect assistance for reasons as defined as "safety of life and/or property."
"which you are certainly legally allowed to do" he said "just make sure it is a bonafided emergency"
But, I added, the question that keeps arising in this forum discussion- is this legal under an Amateur Radio License?
" No, it isn't. Their is no provision to step outside the privileges of the license grant, but that isn't what is at issue here. You are not operating a Amateur radio station any longer-- you are now operating an unlicensed station in a dire emergency, which is allowed under both FCC and international regulations. You can use callsigns if you wish to establish legitimacy, if you like, but remember, this is no longer a 'ham' station....it would be the same for any station, ham, police, broadcast"
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This confirmed what I thought... and as far as I am concerned, finishes me here.... but let the discussion continue! for I am sure it is far from over......

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..............................CF
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* I have had some issues with who exactly has primacy use in the 420-450Mhz band... some people unfortunately had to move