What applies with this traffic sign?

This traffic sign indicates a taxi stand where taxis can stop and wait for passengers. As a driver approaching this sign, you must be aware that taxis may be moving off or coming to a stop here. Therefore, you need to be attentive and ready to anticipate their actions to ensure safety.

Stopping or parking for other vehicles is generally not allowed in this area because it would block the taxis' space for picking up and dropping off passengers. So it is correct that you have to anticipate taxi movements, but you may not stop or park yourself in this zone. This helps keep the taxi stand clear and functioning properly.