When is it acceptable to overtake a bus that has just started moving?

Overtaking a bus that has just started moving is acceptable only after it has fully left the bus stop because safety is the primary concern in this scenario. Buses often have passengers getting on and off, and they frequently stop to accommodate this. If a bus is still partially at the stop, there may be passengers still alighting or boarding, which creates a significant safety risk if you attempt to overtake.

Once the bus has fully departed the stop, you can be more assured that no passengers are in immediate danger of crossing in front of it. This allows you to make a safer decision to overtake while ensuring that you are not putting anyone at risk.

Considering the other options, simply being in a hurry does not justify the danger of overtaking a bus that might still present hazards. The visibility condition does not ensure safety if passengers are still situated near the bus. Stating that it is never acceptable would ignore the possibility for safe overtaking after the bus has cleared the stop.