In CAWIS, a valid Canadian Aviation Document number is deemed to be either
SDR User Type 1 - An AME number (Aircraft Maintenance Engineer)
SDR User Type 2 - An AMO number (Approved Maintenance Organization)
SDR User Type 3 - An AOC number (Air Operating Certificate)
Although other valid document types exist (Pilot Licenses, Private Operating Certificates, etc. . .)
CAWIS does not have the interfaces available to verify these other data types.
CAWIS will allocate a Userid for SDR submissions, to anyone registering with a valid Canadian Aviation document number that is not already in use by another submitter.
Registration url
https://wwwapps.tc.gc.ca/saf-sec-sur/2/cawis-swimn/wsdrs_reg.aspx