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(1)If—
(a)a person on whom a notification is served under section 695 does not send a statutory declaration to an officer of Revenue and Customs under section 696 within 30 days of the issue of the notification, or
(b)the tribunal to which such a declaration is sent under section 697 determines that there is a prima facie case for serving a notice on a person under this section,
the income tax advantage in question is to be counteracted by adjustments.
(2)The adjustments required to be made to counteract the income tax advantage and the basis on which they are to be made are to be specified in a notice served on the person by an officer of Revenue and Customs.
(3)In this Chapter such a notice is referred to as a “counteraction notice”.
(4)Any of the following adjustments may be specified—
(a)an assessment,
(b)the nullifying of a right to repayment,
(c)the requiring of the return of a repayment already made, or
(d)the calculation or recalculation of profits or gains or liability to income tax.
(5)Nothing in this section authorises the making of an assessment later than 6 years after the tax year to which the income tax advantage relates.
(6)This section is subject to—
section 699 (limit on amount assessed in section 689 and 690 cases),
section 700 (timing of assessments in section 690 cases), and
section 702(2) (effect of clearance notification under section 701).
(7)But no other provision in the Income Tax Acts is to be read as limiting the powers conferred by this section.