The short answer

Not stated

The pages say certificate holders from another Canadian province or territory must use a PDF application form to obtain an Ontario Certificate of Qualification, but do not state whether an exam or assessment is required.

Source
“If you have a certificate, license or credential from another Canadian province or territory and would like to obtain an Ontario Certificate of Qualification, please note that the Canadian certificate holder application is currently not available through the Skilled Trades Ontario Portal.”
skilledtradesontario.ca/skilled-trades-ontario-portal

Both provinces

Licensed in British ColumbiaMoving to Ontario
Licence status Voluntary certification Voluntary certification
Regulator SkilledTradesBC Skilled Trades Ontario
Guide Ironworker (structural/ornamental) in British Columbia Ironworker (structural/ornamental) in Ontario

Steps to transfer

  1. Review the application guide

    Source
    “Review the Canadian Certificate Holder Guide and Form and follow the application instructions.”
    skilledtradesontario.ca/skilled-trades-ontario-portal
  2. Submit the PDF application

    Source
    “You must use the PDF application form and email or mail your application to Skilled Trades Ontario.”
    skilledtradesontario.ca/skilled-trades-ontario-portal

Processing time: Not stated by the regulator Check with Skilled Trades Ontario

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