Two-wheeled **mopeds** have certain specific obligations due to their lower visibility, stability, and resistance compared to other vehicles. One of these obligations is the use of **rearview mirrors**.

- **Left rearview mirror**: It is mandatory for two-wheeled mopeds to have at least one rearview mirror on the left side. This is because the left rearview mirror is essential for the driver to see the traffic approaching from behind and to the left, which is crucial for performing safe maneuvers such as overtaking or changing lanes.

- **Right rearview mirror**: It is not mandatory on two-wheeled mopeds. Although it can be useful, the regulations only require the left rearview mirror.

Therefore, the obligation for a two-wheeled moped is to carry **only the left rearview mirror**.