Nolo, I'm supposing that from the thread "Should PSIA have a nationally standardized exam?" http://www.epicski.com/cgi-bin/ultim...c;f=4;t=001083
that this implies that there are different PSIA standards in the US. To what extent these vary I do not know. I suppose what I should have said is that CSIA methodology 'seems' more standardised across Canada then PSIA methodology is across the US.
With CSIA, the examiners are hired directly by the national organisation. The manuals, literature used, etc. are all from the national office. Most of the manuals are on their site http://www.snowpro.com/csia/e/downloads.html
Only at the Entry Level (Level 1) does there seem to be some regional input, but still the same manuals are used. A CSIA level is considered the same anywhere in Canada, there is no need to re-csertify locally.
As Ant states above, you can pass your higher CSIA levels without having done any teaching. What this means though is that the 'Hiring Clinic' in many ski schools is independent of your CSIA levels.
Just to stick out my neck a bit here, with CSIA, as with PSIA, skiing ability seems to be your main bottleneck in passing the higher levels or classifications.