wrote

Canada, IIRC, has less than 1/10th the number of
hams as the USA, spread out across a larger area.

90% of all Canadians live within 75 miles of the USA, a distance trivial to HF
propagation.

Yet the Canadian HF ham bands are virtually
the same as the US ones.

Yes, they share the same bands with us, and without arbitrary in-band segments
based on mode or bandwidth. On 160M, 80M, 40M, 20M, 17M, 15M, and 12M they are
limited to a 6kHz bandwidth signal anywhere inside the band. On 30M they are
limited to 1kHz bandwidth, and on 10M they are limited to 20kHz bandwidth.

Since, as you point out, their bands are virtually the same ones we use right
next door, certainly we'd know about any problems with their style of
regulation.

the Canadian amateur power limit.

2.25 KW PEP output on SSB, 750W output on other modes. Certainly sufficient to
spill outside their southern border.

It seems to me that it's more spectrum-efficient to
have like modes together, rather than mixed.

Our HF bands are hardly congested, and as the "worldwide-except-USA" experience
shows, hams have pretty well figured out how to share the spectrum without
governments imposing mode/bandwidth segments on them.

IMHO, narrow and wide modes do not coexist well. That alone
is a good reason to have subbands-by-mode, or at least
subbands-by-bandwidth, on the ham bands.

Morse (a "narrow" mode) is allowed on all MF/HF frequencies except the 60M
channels. Have you seen any problems caused by that?

In Canada SSB is allowed anywhere on any MF/HF frequency. Have you heard
reports of problems with that? Europe (much more densly populated than US or
Canada) doesn't seem to have mode coexistance problems.

It's time FCC quits micromanaging our assigned spectrum.

btw, Hans, when are you going to submit your restructuring proposal to
FCC?

It's in their hands.

73, de Hans, K0HB