The short answer

Not stated

The pages say holders of a certificate, licence or credential from another Canadian province or territory must apply using the PDF Canadian Certificate Holder form, but do not state whether they can register without retaking the entry-to-practice exam or a competence assessment.

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 Northwest TerritoriesMoving to Ontario
Licence status Voluntary certification Certification required
Regulator Apprenticeship, Trades and Occupations Skilled Trades Ontario
Guide Steamfitter-Pipefitter in Northwest Territories Steamfitter-Pipefitter in Ontario

Steps to transfer

  1. Apply using the PDF form

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

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

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

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