Regulation 17 Determination of questions on previous view of the lawI1

Where any payment has been made and accepted in satisfaction of any liability for tax and on a view of the law then generally received or adopted in practice, any question whether too little or too much has been paid or what was the right amount of tax payable shall be determined on the same view, notwithstanding that it appears from a subsequent legal decision or otherwise that the view was or may have been wrong.