N.C. Gen Stat. § 42-42 to 42-44 – Landlord and Tenant Articles   – Residential Rental Agreements

Requires landlords to provide one operable carbon monoxide   detector per rental unit per level. A landlord that installs one carbon   monoxide detector per rental unit per level shall be deemed to be in   compliance with standards under this subdivision covering the location and   number of detectors. The landlord shall replace or repair the carbon monoxide   detectors within 15 days of receipt of notification if the landlord is   notified of needed replacement or repairs in writing by the tenant. The   landlord shall ensure that a carbon monoxide detector is operable and in good   repair at the beginning of each tenancy. Unless the landlord and the tenant   have a written agreement to the contrary, the landlord shall place new   batteries in a battery-operated carbon monoxide detector at the beginning of   a tenancy, and the tenant shall replace the batteries as needed during the   tenancy. Failure of the tenant to replace the batteries as needed shall not   be considered as negligence on the part of the tenant or the landlord. This   subdivision applies only to dwelling units having a fossil-fuel burning   heater or appliance, fireplace, or an attached garage. Provides for   penalties.