According to Article 7 of Regulation (EC) No 561/2006, what is the mandatory requirement for driving breaks after a continuous driving period of 4.5 hours?

1. An uninterrupted break of at least 45 minutes, which may be replaced by a break of at least 15 minutes followed by a break of at least 30 minutes
2. An uninterrupted break of at least 45 minutes, which may be replaced by three separate breaks of 15 minutes each
3. An uninterrupted break of at least 30 minutes, followed by another 15 minutes within the next hour
4. An uninterrupted break of at least 45 minutes, which may be split into 30 minutes followed by 15 minutes