For a single occasional passenger service wholly within the EU drivers' hours rules, what can the '12-day' derogation permit?

1. It can extend the daily driving limit to 12 hours on each day of a service lasting at least six days
2. It can postpone daily rest until 25 hours after duty on successive days throughout the service
3. It can postpone weekly rest for up to 12 consecutive 24-hour periods after a regular weekly rest
4. It can remove weekly rest from a regular timetabled service when the bus uses a digital tachograph