10(1)This paragraph applies where—U.K.
(a)any tax non-compliance by a person consists of a failure to comply with an obligation to deliver a return or other document, and
(b)a complete and accurate return or other document would have included information that would have enabled or assisted HMRC to assess the person's liability to tax.
(2)The tax non-compliance “involves an offshore matter” if the liability to tax that would have been shown in the return or other document is or includes a liability to tax charged on or by reference to—
(a)income arising from a source in a territory outside the UK,
(b)assets situated or held in a territory outside the UK,
(c)activities carried on wholly or mainly in a territory outside the UK, or
(d)anything having effect as if it were income, assets or activities of a kind described above.
(3)Where the tax at stake is inheritance tax, assets are treated for the purposes of sub-paragraph (2) as situated or held in a territory outside the UK if they are so situated or held immediately after the transfer of value by reason of which inheritance tax becomes chargeable.
(4)The tax non-compliance “involves an offshore transfer” if—
(a)it does not involve an offshore matter, and
(b)the applicable condition is satisfied in respect of the liability to tax that would have been shown by the return or other document (see sub-paragraphs (5) to (7)).
(5)Where the tax at stake is income tax the applicable condition is satisfied if the income on or by reference to which tax is charged, or any part of the income—
(a)was received in a territory outside the UK, or
(b)was transferred on or before 5 April 2017 to a territory outside the UK.
(6)Where the tax at stake is capital gains tax, the applicable condition is satisfied if the proceeds of the disposal on or by reference to which the tax is charged, or any part of the proceeds—
(a)was received in a territory outside the UK, or
(b)was transferred on or before 5 April 2017 to a territory outside the UK.
(7)Where the liability to tax which would have been shown in the document is a liability to inheritance tax, the applicable condition is satisfied if—
(a)the disposition that gives rise to the transfer of value by reason of which the tax becomes chargeable involves a transfer of assets, and
(b)after that disposition but on or before 5 April 2017 the assets, or any part of the assets, are transferred to a territory outside the UK.
(8)In the case of a transfer falling within sub-paragraph (5)(b), (6)(b) or (7)(b), references to the income or proceeds transferred are to be read as including references to any assets derived from or representing the income or proceeds.