(28)In view of the growing availability and use of advanced driver assistance systems and automated driving systems, it is necessary to include requirements relating to those systems in theory tests, in order to ensure drivers’ general knowledge of the advantages, limitations and risks associated with such systems. That knowledge requirement should cover, in particular, the field of use of the automated driving systems, the existence of take-over requests by the automated driving systems, and the subsisting obligations of the driver while automated driving systems are active.