That might vary by country or area, but others might know. I just
remember (when I owned a car), that the annual or bi-annual renewal had
a paragraph near the end that lists somethng like "Have you been
diagnosed since you last reported with  xxx, yyy,zzz,  epilepsy, aaa,
bbb, ccc, ddd or been told to see a Dr. about any of those conditions?"
and a release part in some juridictions to allow them to contact the
Dr. for further information.  I found when I wasn't controlled, I had
to get the Dr. to update new forms each ~3months until I had been
'clean' for 1-2 years.
 I *think while you are not controlled, that if you had an accident
and they found out you hadn't reported, that the insurance could be
void ?  (Potentially costly if a major accident involving others
occured.) That could vary according to Government laws too.  (I never
trust insurers as a matter of course-- the no. I found who were worthy
of trust I can count on one hand, not even related to living with Ep.)
G./