Section 269-106 - Billing periods; twelve-month reconciliation(a) Billing of net energy metering customers shall be on a monthly basis; provided that the last monthly bill for each twelve-month period shall reconcile for that twelve-month period the net electricity provided by the electric utility with: (1) The electricity generated by the eligible customer-generator and fed back to the electric grid over the monthly billing period; and(2) Any unused credits for excess electricity from the eligible customer-generator carried over from prior months since the last twelve-month reconciliation period.(b) Credits for excess electricity from the eligible customer-generator that remain unused after each twelve-month reconciliation period may not be carried over to the next twelve-month period. L 2001, c 272 , pt of §6; am L 2005, c 104, §6 .