Thanks for the information Sir,
But while Browsing the net for more than 5hours, I saw this information from CWB GROUP:

The Canadian Welding Bureau and American Welding Society recognize the qualifications each organization gives to welding inspectors under their respective qualification scheme. Welding inspectors who are certified to Level 1 of CSA Standard W178.2 are eligible to apply for the AWS QC-1 CAWI qualification without undertaking further examinations. Level 2 welding inspectors may apply for the AWS QC-1 CWI qualification. Similarly, welding inspectors with the AWS QC-1 CAWI qualification may apply for CSA W178.2 Level 1 qualification. Welding inspectors with the AWS QC-1 CWI qualification may apply for W178.2 Level 2 qualification provided they have been certified as a CWI for a minimum of 2 years. There is no reciprocal arrangement for CSA W178.2 Level 3 and AWS QC-1 SCWI welding inspectors at this time.
Check this out:
http://www.cwbgroup.org/tal/44142522488581925184.asp

I therefore conclude that if you are currently AWS/CWI for a minimum of two years you can apply for W178.2 through Reciprocal Arrangement.

Please Explain?!?!  As far as I know you can ger an AWS Cwi by just applying, if you are a CWB Level 2.  I know three CWB Level 2s who did it for one of the bridge projects I was the QA inspector for.