It is an affirmative defense to any action by a landlord based upon nonpayment or partial payment of rent that the landlord increased the rent primarily because the tenant had received, or was eligible for, reimbursement under this subchapter . [C75, 77, 79, 81, §425.35 ] 2018 Acts, ch 1041, §127 Referred to in §25B.7 , 427.9 , 435.33