Is it permitted to stop any vehicle other than a taxi where the following signpost is placed?

1. It is absolutely forbidden.
2. Correct answer: No, except for stopping in order to unload passengers.
3. Yes, if there are no taxies parked there.
4. Yes, for the purpose of loading passengers only.

WhyWhere there is a taxi stand, other vehicles may not stop. The exception is quickly dropping off a passenger; waiting is not allowed.