I can't find any legislation but I'm not sure courses ever "expire". I did one type course and got the thing on my license 5 years later.
I had to do a bit of a refresher course (which ended up being a glorified gen' fam' course of about 4 days) and some OJT sheets (2 weeks worth as I had a very similar type already).
My quality department at the time bashed the details out with the regional office.