Literally, "against the person." In personam refers to courts' power to adjudicate matters directed against a party, as distinguished from in-rem proceedings over disputed property.
This controlled vocabulary originally categorized the topical pages.
Most jurisdictions read residential leases to include an implied warranty of habitability. This warranty requires landlords to keep their property "habitable," even if the lease does specifically require them to make repairs. Furthermore, the warranty conditions a tenant's duty to pay rent on the landlord's duty to maintain a habitable living space. This makes it easier for tenants to get landlords to make repairs.