Paragraph 24
Where by reason of any conduct a person—
has been convicted of an offence, or
is liable to a penalty otherwise than under paragraph 1 for which the person has been assessed (and the assessment has not been successfully appealed against or withdrawn),
that conduct does not give rise to liability to a penalty under paragraph 1.
In sub-paragraph (1) the reference to a penalty otherwise than under paragraph 1—
includes a penalty under paragraph 6 of Schedule 55 to FA 2009, but does not include penalties under any other provision of that Schedule, and
includes a penalty under subsection (5) of section 93 of TMA 1970 but, does not include penalties under any other provision of that section.
But the aggregate of—
the amount of a penalty under paragraph 1, and
the amount of a penalty under paragraph 5 of Schedule 55 which is determined by reference to a liability to tax,
must not exceed 200% of that liability to tax.
In sub-paragraph (1) “conduct” includes a failure to act.