Bring up the link and you will note that the Canadians already use
bandwidth-based mode regulation. The standard is simply a maximum bandwith
for any signal anywhere in the band. Unfortunately (or apparently so) the
prescribed bandwidth would be overly restrictive to AM if strictly enforced.
On the lower HF bands, the only mode definition is 6 kHz maximum, with no
subbands. Period.
But I have never heard of a Canadian AM'er being cited for a signal of
excessive bandwidth from his otherwise properly operated transmitter.
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