How are loading times to be proven with this tachograph prior to departure?

Your answer is correct because according to German traffic regulations, loading times that occur before departure must be recorded directly in the tachograph. This is done by entering those times into the device itself, ensuring an accurate and official record of the driver's activities. Writing loading times on a separate sheet of paper or simply notifying the employer is not sufficient, as only the tachograph entry is legally recognized for proving these periods. This rule helps maintain clear, standardized documentation of working and rest times for professional drivers.