A penalty shall not be assessed on an additional tax assessment made by the Administrator when a return has been filed in good faith and the tax paid thereon within the time prescribed by the Administrator; and in the absence of fraud, neither penalty nor interest shall be assessed on any additional tax assessment resulting from a federal audit, providing an amended return is filed and the additional tax is paid within three months after a final determination of the federal tax liability. (Ord. 71-10. Passed 11-1-10.)