Section 410.200  Corrections and Adjustments for Meter Error

a)         Whenever any test made by any entity or by the Commission shows a meter to have an average error of more than 2%, a correction of the metering data shall be determined by the entity providing metering service and that correction shall be conveyed within 3 business days to the customer and to other entities involved in billing the customer.

b)         When a meter is found to have an average error of more than 2%, the entity providing metering service shall determine the metering data correction using the actual percentage of error as determined by the test, not the difference between the allowable error and the error found as a result of a test.

c)         If the meter is found to run faster than allowable, the entity providing metering service shall determine the correction to the metering data for that meter. In determining the correction it shall be presumed, unless demonstrated otherwise, that the inaccuracy has existed for a period of 2 years. This period of presumed inaccuracy shall not exceed the time for which records of the current customer's usage exist.

d)         If the meter is found to be slower than allowable, the entity providing metering service shall determine the correction to the metering data for that meter. In determining the correction, it shall be presumed, unless demonstrated otherwise, that the inaccuracy has existed for a period of 1 year prior to the test for small commercial and residential customers and 2 years prior to the test for all other customers.

e)         In the case of a non-registering meter that has been read during the period of non-registration, the entity providing metering service shall not determine a correction to metering data for estimated consumption extending over more than twice the regular interval between readings.

f)         No corrections to metering data for meter error shall extend beyond the in-service date of the meter discovered to be in error, nor shall any correction be required to extend beyond the date upon which the current customer first occupied the premises at which the error is discovered.

g)         Whenever an entity or the Commission's representative finds that a service watt-hour meter, while in service, exhibits creep, the entity shall make an estimate of the registration caused by the creep during the period as specified under subsection (c) and shall make a corresponding correction in the metering data.

h)         Billing adjustments

1)         For electric utilities. Any correction to metering data for over-registration shall be accompanied by an adjustment to customer billing by any electric utility that rendered service that is affected during the period of adjustment. Corrections made to metering data for under-registration may be accompanied by an adjustment to a customer's billing. However, if an electric utility is providing metering service, in no case shall an adjustment to a customer's billing be made for under-registration if all testing and accuracy requirements of this Part have not been met.

2)         For entities other than electric utilities. Any correction to metering data made by any entity other than an electric utility and all records relating to the adjustment of the customer's billing or charges shall be retained for at least 2 years.

i)          Provisions of this Section do not apply to situations in which the customer's wires, meters or other service equipment have been tampered with and the customer enjoyed the benefit of the tampering.