Not included in the calculation of availability are (i) the regular maintenance windows, which can be up to 5 hours per week and are usually carried out between 22:00 and 4:00 Central European Time, (ii) times of unavailability due to mandatory unscheduled maintenance work that is necessary to eliminate malfunctions, (iii) times of unavailability due to circumstances beyond Pupil Labs’ control, in particular force majeure.</p> <p>4.3.