When approaching the stopping place for a school bus outside the built-up area, are you obliged to allow the driver of the bus to enter the roadway, if it signals the intention to perform such a manoeuvre?

The orange vehicle visible in the photo is a school bus. According to Art. 18a para. 1 pt. 2 of the Road Traffic Act, a driver approaching a school bus stop is obliged to reduce speed and, if necessary, stop to allow the bus to enter the roadway, provided it signals such intention. This obligation applies to school buses regardless of whether they are in or outside built-up areas.