23 CAR § 466-403. Calculation of average bill

(a) For adequate billing history. The average bill is the total of the last four (4) months’ bills divided by four (4). (b) For inadequate billing history. If a customer or an applicant for service has fewer than four (4) months’ billing history with the LEC, the average bill shall not be more than the anticipated amount of one (1) month’s bill.