Defining the precise date of 'release' will be difficult given sentences often wind down with home visits and curfews.
I can foresee arguments from killer drivers about when their ban starts, or more importantly, when it ends.
The Prison Service will have to liaise with the DVLA, who will in turn will have to update the criminal record.
Lots of opportunity there for administrative foul-ups, not least because none of it will be done in public.
An advantage with imposing the ban at the same time as the jail sentence is everyone can hear what's been said, and it's on the court's taped log.
I hope the minister has thought this through, but it wouldn't be the first time a populist measure has been announced without a minister doing so.