12(1)This paragraph applies where—U.K.
(a)tax is chargeable under paragraph 9 or 11 (withdrawal of reconstruction or acquisition relief),
(b)the amount so chargeable has been finally determined, and
(c)the whole or part of the amount so chargeable is unpaid six months after the date on which it became payable.
(2)The following persons may, by notice under paragraph 13, be required to pay the unpaid tax—
(a)any company that at any relevant time was a member of the same group as the acquiring company and was above it in the group structure;
(b)any person who at any relevant time was a controlling director of the acquiring company or a company having control of the acquiring company.
(3)For the purposes of sub-paragraph (2) “relevant time” means any time between effective date of the relevant transaction and the change of control by virtue of which tax is chargeable.
(4)For the purposes of sub-paragraph (2)(a) a company (“company A”) is “above” another company (“company B”) in a group structure if company B, or another company that is above company B in the group structure, is a 75% subsidiary of company A.
(5)For the purposes of sub-paragraph (2)(b)—
(a)“director”, in relation to a company, has the meaning given by section 67(1) of the Income Tax (Earnings and Pensions) Act 2003 (c. 1) (read with subsection (2) of that section) and includes any person falling within section 417(5) of the Taxes Act 1988 (read with subsection (6) of that section); and
(b)“controlling director”, in relation to a company, means a director of the company who has control of it (construing control in accordance with section 416 of the Taxes Act 1988).