How does one find an engineer or someone to help with reviewing existing Atmosphere Explosives (ATEX) certified area drawings and certifying for Canada?

Panel members have not encountered a device or area classification for ATEX approval within Canada. ATEX is a European Union directive and is not generally recognized within North American standards. The second link below references a UL similarity. https://news.nilfiskcfm.com/2017/03/atex-certification-applicable-north-america/;    https://www.ul.com/services/atex-certification-european-union. As with any area or device classification, the designer is responsible for demonstrating to any regulatory body or Authority Having Jurisdiction granting approval that the design meets the standard. In addition, every attempt should be made to reference and meet current relevant standards and codes, rather than trying having to apply for exceptions.