My oldest Leased Operator in Ontario is 71. I think the
rules might have changed a bit since you last had your
fingers in the pie.
He was retested annually from 65 on to keep his AZ,
and he drives a one-ton truck (hauling RV's for us).
He would have to rent a class 8 tractor and a 45' trailer
each year for his driving test. He's been driving commercially
for 49 years (I'm not kidding you). When I first looked at
his application and his approximate# of driving miles, I just
about shat my pants. Anyway, this year he dropped from an
AZ to a G as he didn't need the AZ to do what he does for us,
and he got into a screaming match with the driver examiner the
year before (who he tells me is younger than any of his grand
kids). He passed, but he wasn't happy about it....