When a customer has been overcharged as a result of incorrect reading
of the meter, incorrect application of the rate schedule or classification,
incorrect connection of the meter or any other reason, the amount
of the overcharge shall be adjusted, refunded or credited to the customer.
When a customer has been undercharged as a result of an incorrect
reading of the meter, incorrect connection of the meter, or any other
reason, the amount of the undercharge will be billed to the customer.