§ 21
If the landlord intends to enter into a rental agreement pursuant to § 19, subsection 2, and it is the first rental of the particular tenancy under § 19, subsection 2, the landlord must inform the tenant representatives or tenants about this and the content of this provision when the tenancy is terminated or revoked, and before a new rental agreement is made. Otherwise, the condition regarding rent determination under § 19, subsection 2, is invalid. The tenant representatives or tenant may, within 14 days after the notification is given, bring a case concerning lack of maintenance before the rent tribunal, cf. § 114. The tenant representatives or tenant must specify the maintenance deficiencies, which can only concern deficiencies outside the individual tenancies. If the rent tribunal issues an order for the rectification of maintenance deficiencies, cf. § 114, subsection 2, rent under § 19, subsection 2, cannot be charged until the identified maintenance deficiencies are rectified.
Stk. 2.It is the responsibility of the landlord to maintain the comprehensive improvement of the tenancy. If a dispute arises regarding this, the tenant may bring the matter before the rent tribunal, but not earlier than 5 years after such a case was last presented to the rent tribunal by this tenant. If the landlord is deemed not to have fulfilled the obligation to maintain the comprehensive improvement, future rent must be calculated according to § 19, subsection 1.