residential building if clearly stated in the rental agreement or lease for the residential building. All energy submetering equipment and energy allocation equipment shall meet the requirements and standards established and enforced by the State Corporation Commission pursuant to § 56-245.3.
C. If energy submetering equipment, energy allocation equipment, or water and sewer submetering equipment is used in any residential building, the owner, manager, or operator of such residential building shall bill the tenant for electricity, oil, natural gas, or water and sewer for the same billing period as the utility serving the residential building, unless the rental agreement or lease expressly provides otherwise. The owner, manager, or operator of such residential building may charge and collect from the tenant additional service charges, including monthly billing fees, account set-up fees, or account move-out fees, to cover the actual costs of administrative expenses and billing charged to the residential building owner, manager, or operator by a third-party provider of such services, provided that such charges are agreed to by the residential building owner and the tenant in the rental agreement or lease. The residential building owner may require the tenant to pay a late charge of up to $5 if the tenant fails to make payment when due, which shall not be less than 15 days following the date of mailing or delivery of the bill sent pursuant to this section.
D. If a ratio utility billing system is used in any residential building, in lieu of increasing the rent, the owner, manager, or operator of such residential building may employ such a program that utilizes a mathematical formula for allocating, among the tenants in a residential building, the actual or anticipated