As already stated, the Mk 3 Jazz CVT fluid should be changed every 2 years or 25,000 miles - whichever comes first.
Vertu Honda failed to do this on my car at the 2 year service, unfortunately I didn't notice this until just before the 3 year service was due. I contacted Honda customer service to confirm the fluid change interval and then forwarded their reply to the Vertu Honda service manager. This got the result I expected - apologies and the fluid changed at the 3 year service. They will have to change it again at the 4 year service to get it back on the 2 year/25000 mile schedule.
So, check your service documentation carefully before driving home after a service!