256.186—Miscellaneous deferred debits.
This account shall include all debits not provided for elsewhere, such as the costs of service performed which have not been billed to associate or nonassociate companies and unusual or extraordinary expenses, not included in other accounts, and items the proper final disposition of which is uncertain. The records supporting the entries to this account shall be so kept that the service company can furnish full information as to the purpose, monthly balance, status, write-off and duration of each deferred debit.