Paragraph 8

In a case to which this Part of this Schedule applies, the amount payable under an original assessment, or any fresh assessment made F1by virtue of a revision under section 16 of the Act or a decision under section 17 of the Act superseding an earlier decision, during the period of one year beginning with the date on which the original assessment takes effect or, if shorter, until any of the conditions specified in paragraph 7(1) is no longer satisfied, shall, instead of being the formula amount, be the modified amount.