If overtime work becomes necessary, the employee is obliged to perform it to the extent that he is able to do so and it can be expected of him in good faith.
Such overtime shall only be compensated – at the normal wage plus a surcharge of 25 per cent – if no other arrangement has been agreed. The parties can therefore regulate the question of compensation as they wish.
Such other arrangements are, in particular, the compensation of overtime by time off or the remuneration only at the normal wage without a supplement. However, the complete exclusion of any compensation is also possible under certain conditions.