A bus has 15 passenger seats. What is the minimum number of standard first-aid kits required?

According to German traffic regulations, buses with up to 16 passenger seats must have at least one standard first-aid kit on board. Since the bus in the question has 15 passenger seats, it falls within this category and therefore requires at least one first-aid kit. This rule ensures that in case of minor injuries or emergencies, basic medical supplies are available to provide immediate aid. For buses with more than 16 passenger seats, additional first-aid kits may be required.