Please note that a sublease is only possible for the maximum of one semester and only during a stay abroad due to studies resp. practical training (written proof required!).
The main tenant has to indicate the sublease to the student union previously in time and has to gain the approval. Insofar, we expressly advise you of your written duty of notification, regulated in the tenancy agreement.
A right to sublease does not exist.
If you still sublease your room without approval of the student union, we are forced to make use of our extraordinary right of termination and, in case the room cannot be rented again without interruption, to charge you as damages with the income from rent that we missed out due to the extraordinary termination.