If it appears to an inspector or the Board that the agent is liable to a penalty under paragraph 2(3) or 7(2) above, the amount appearing to be due may be assessed by the inspector or the Board as if it were tax for the year of assessment in which the failure to make the return occurred; and, subject to the provisions of this paragraph, the provisions of the Taxes Management Act 1970 relating to the assessment and collection of tax shall apply accordingly.
An amount assessed by way of penalty under paragraph 2(3) or 7(2) above shall be due at the end of the period of thirty days beginning with the date of the issue of the notice of assessment.
On an appeal against an assessment of an amount by way of penalty under sub-paragraph (3) of paragraph 2 or sub-paragraph (2) of paragraph 7 above, subsections (6) to (8) of section 50 of that Act shall not apply but the Commissioners—
may confirm the amount of the assessment or, if it appears to them that the amount assessed is greater or smaller than the penalty provided for under that sub-paragraph, may reduce it or increase it to such an amount as is appropriate having regard to the provisions of that sub-paragraph; and
if it appears to them that no penalty has been incurred, may set the assessment aside.
Where an amount has been assessed by way of penalty under sub-paragraph (3) of paragraph 2 or sub-paragraph (2) of paragraph 7 above and either no appeal has been brought against that assessment or the amount assessed has been confirmed or varied on appeal—
a certificate of an inspector or other officer of the Board that an amount is due by way of penalty under that sub-paragraph; and
a certificate of a collector that payment of that amount has not been made to him or, to the best of his knowledge and belief, to any other collector, or to a person acting on his behalf or on behalf of another collector,
shall be sufficient evidence that the amount mentioned in the certificates is unpaid and is due to the Crown; and any document purporting to be such a certificate as is mentioned in this sub-paragraph shall be deemed to be such a certificate unless the contrary is proved.
Section 100 of the Taxes Management Act 1970 (procedure for recovery of penalties) shall not apply to a penalty under paragraph 2(3) or 7(2) above.