When, at the end of any year or at such other times as a financial statement may be required by the commission, it is known that a transaction has occurred which affects the accounts, but the amount involved in the transaction and its effect upon the accounts can not be determined with absolute accuracy, then the amount shall be estimated and such estimated amount included in the proper accounts. When the item is audited appropriate adjustments shall be made in the current accounts. The utility is not required to anticipate minor items which would not appreciably affect the accounts.
N.Y. Comp. Codes R. & Regs. Tit. 16 § 461.7