7(1)Where, as a result of a claim under paragraph 4 or paragraph 6 above, the terminal loss is to be dealt with in accordance with this paragraph, then, subject to sub-paragraph (2) below, it shall be deducted from or set off against the amount on which the taxpayer was chargeable to capital gains tax, or as the case may be corporation tax, for years of assessment or accounting periods preceding the year of assessment or accounting period in which occurred the relevant event giving rise to the terminal loss and falling wholly or partly within the period of fifteen years ending with the date of that event.
(2)The amount of the terminal loss which, by virtue of sub-paragraph (1) above, is to be deducted from or set off against the amount on which the taxpayer was chargeable to capital gains tax, or as the case may be corporation tax, for any year of assessment or accounting period shall not exceed the amount of the gain which in that year or period was treated, by virtue of subsection (1)(b) of section 29 of this Act, as accruing to the taxpayer in respect of mineral royalties under the mineral lease or agreement in question ; and subject to this limit any relief given to the taxpayer by virtue of sub-paragraph (1) above shall be given as far as possible for a later rather than an earlier year of assessment or accounting period.
(3)If in any case where relief has been given to the taxpayer in accordance with sub-paragraphs (1) and (2) above there remains an unexpended balance of the terminal loss which cannot be applied in accordance with those sub-paragraphs, there shall be treated as accruing to the taxpayer in the year of assessment or accounting period in which the relevant event occurs an allowable loss equal to that unexpended balance.