Yes, for mandatory/compulsory trades a journeyperson will need to have a trade certificate (e.g. Certificate of Qualification). There are two approaches in the Canadian Free Trade Agreement that describe how the qualification of tradespeople can be recognized. In some provinces or territories, tradespersons with a certificate are required to register and/or be certified with the province/territory where they would like to work in before they can work in a compulsory/mandatory trade. In other provinces or territories, tradespersons with a certificate are allowed by the regulatory authority to work in that province/territory with the certification in good standing from their home jurisdiction.
If you have questions about how a trade certificate will be recognized in a province/territory please contact your Labour Mobility Coordinator.