Network base stations all have NAD83(CSRS) coordinates?

I saw the following from NRCAN's website.

Network RTK : Network base stations all have NAD83(CSRS) coordinates,
corrected positions at the rover are by default are in NAD83(CSRS).

http://www.geod.nrcan.gc.ca/faq_e.php#29

Well, for those Network RTK installed in Europe and Asia, do they also
provide corrections in NAD83(CSRS)? I think ITRF or WGS-84 might be a
better choice although the difference is very small.

Thanks.

Johnson