N.C. Gen. Stat. § 66-9
It shall be the duty of all gas companies and electric light companies selling gas and electricity to the public to show, among other things, on all statements or bills rendered to consumers, the reading of the meter at the end of the preceding month, and the reading of the meter at the end of the current month, and the amount of electricity, in kilowatt hours, and of gas, in feet, consumed for the current month; provided, however, that nothing herein contained shall be construed to prohibit any gas or electric company from adopting any method of and times of reading meters and rendering bills that may be approved by the North Carolina Utilities Commission.
Any gas or electric light company failing to render bills or statements, as provided for in this section, shall be subject to a penalty of ten dollars ($10.00) for each violation of this section or failure to render such statements, recoverable in the district court by any person suing for the same; but this section shall not apply to bills and accounts rendered customers on flat rate contracts.
N.C. Gen. Stat. § 66-9