Paragraph 18 Assessment of penalties
United Kingdom
Notice of an assessment of a penalty under this paragraph must—
be given to the person liable to the penalty, and
state the date on which it is issued and the time within which an appeal against the assessment may be made.
Subject to sub-paragraph (4), after a notice of assessment of a penalty under this paragraph has been given, the assessment must not be altered except on appeal.
If it is discovered by an officer of Revenue and Customs that the amount of a penalty under paragraph 7(b), 10(b) or 12(b) which has been assessed under this paragraph is or has become insufficient, the officer may make an assessment in a further amount so that the penalty is set at the amount which, in the opinion of that officer, is appropriate.