Valid from 01/04/2008
13(1)Where P becomes liable for a penalty under paragraph 1 or 2 HMRC shall—U.K.
(a)assess the penalty,
(b)notify P, and
(c)state in the notice a tax period in respect of which the penalty is assessed.
(2)An assessment—
(a)shall be treated for procedural purposes in the same way as an assessment to tax (except in respect of a matter expressly provided for by this Act),
(b)may be enforced as if it were an assessment to tax, and
(c)may be combined with an assessment to tax.
(3)An assessment of a penalty under paragraph 1 must be made within the period of 12 months beginning with—
(a)the end of the appeal period for the decision correcting the inaccuracy, or
(b)if there is no assessment within paragraph (a), the date on which the inaccuracy is corrected.
(4)An assessment of a penalty under paragraph 2 must be made within the period of 12 months beginning with the end of the appeal period for the assessment of tax which corrected the understatement.
(5)For the purpose of sub-paragraphs (3) and (4) a reference to an appeal period is a reference to the period during which—
(a)an appeal could be brought, or
(b)an appeal that has been brought has not been determined or withdrawn.
(6)Subject to sub-paragraphs (3) and (4), a supplementary assessment may be made in respect of a penalty if an earlier assessment operated by reference to an underestimate of potential lost revenue.