§ 99

If the use of the rented property is wholly or partially in violation of legislation, other public regulations, servitudes, or similar rights over the property that were in effect at the time of the lease agreement, the tenant may demand a proportional reduction in rent and compensation. The tenant may also terminate the lease agreement if the use is significantly restricted or the landlord has acted fraudulently.

Stk. 2.Stk. 1 does not apply if the tenant knew that the use was unlawful, nor if the tenant's ignorance is due to gross negligence. Furthermore, Stk. 1 does not apply if the unlawful condition has not resulted in any restrictions on the tenant's right of use and the landlord promptly rectifies the situation upon request.

Stk. 3.If the rented property is defective under Stk. 1, the tenant must notify the landlord within 2 weeks of the commencement of the tenancy that the tenant intends to assert the defect, in order not to lose the right to invoke it. However, this does not apply if the defect cannot be recognized with ordinary diligence or if the landlord has acted fraudulently.