Renewal of Canadian Engineering Certificates of Competence is covered in the Marine Personnel Regulations, section 107,
which can be accessed here:http://laws.justice.gc.ca/eng/SOR-2007- ... 1-gb:s_104
If you are at sea, you need 3 months sea time in the last 12 months, or 12 months in the past 5 years, and a valid Seafarer's Medical from an approved Doctor.
That's it! Easy, eh?
If you are ashore, it's a bit more complicated, but not much. All acceptable qualifying service is listed in the referenced Section 107.
Discourage incest, ban country "music".