Kix,
No. All that is required at the three and six year mark is an eye test, renewal fee and documentation of work history to show at a minimum two out of three years inspection, if memory serves me correctly.
And I am quite sure that if my memory has failed me, or I have left something out, someone will quickly step in and bring us up to speed. :-)
John
BTW- Things have change quite a bit since I aquired my CWI, but if I remember correctly, the CWI stamp arrived in the mail shortly after the test results, cert. and card. I do not remember there being any extra charge for the initial stamp, but a charge will apply for a replacement.
I also remember something about the stamp being metal in the old days, rather than the plastic used now. But that is another subject.