On a reversible lane...

A)you must travel at a maximum of 100 km/h and a minimum of 60 km/h.
B)you must never change lanes except to overtake.
C)you must always have the dipped headlights on.Correct
During the day, the following must have their low-beam or dipped headlights switched on: motorcycles travelling on any road, whether urban or interurban, and all vehicles travelling on:
- A reversible lane.
- A circumstantial additional lane, as well as vehicles travelling on hard shoulders.
- A lane enabled for travel in the opposite direction to the usual one, whether a lane exclusively reserved for them or one exceptionally opened to traffic in that direction.
- A normal-direction lane adjacent to one enabled for travel in the opposite direction to the usual one.