(1) Where rent has been paid in advance for the period after termination of the lease, the lessor is to reimburse it with interest accrued since receiving it. If the lessor is not responsible for termination of the lease, then they are to reimburse their gains in accordance with the provisions on the surrender of unjust enrichment.
(2) In the case of a lease for residential space, any deviating agreement to the disadvantage of the lessee is ineffective.