Assessments under paragraphs 3 and 4U.K.
5(1)An assessment under paragraph 3 or 4 above shall not be made more than two years after the time when evidence of facts sufficient in the opinion of the Commissioners to justify the making of the assessment comes to the knowledge of the Commissioners.
(2)Where an amount has been assessed and notified to any person under paragraph 3 or 4 above, it shall be recoverable as if it were aggregates levy due from him.
(3)Sub-paragraph (2) above does not have effect if, or to the extent that, the assessment in question has been withdrawn or reduced.