As used in this Section:
(a) “Tenant” means a person entitled under a rental agreement to the use and occupancy of residential premises to the exclusion of others;
(b) “Landlord” means the owner, lessor, or sublessor of residential premises, the agent of the owner, lessor, or sublessor, or any person authorized by the owner, lessor, or sublessor to manage the premises or to receive rent from a tenant under a rental agreement.