77(1)This paragraph applies if, as a result of sections 515 to 517, an amount of expenditure for an accounting period ending after 31 March 2010 or any subsequent accounting period (“the carry back accounting period”) is treated as non-charitable expenditure for an accounting period beginning before 22 March 2006 or any earlier accounting period.U.K.
(2)The amount of relief or exemption to be disallowed in respect of the accounting period beginning before 22 March 2006 or any earlier accounting period is not to exceed the amount which would have been disallowed in respect of that period if—
(a)sections 515 to 517 had not applied in relation to the carry back accounting period, and
(b)the amount of expenditure for the carry back accounting period to be treated as non-charitable expenditure for an earlier accounting period had instead been calculated in accordance with the provisions mentioned in sub-paragraph (3).
(3)Those provisions are—
(a)sections 505 and 506 of ICTA, and
(b)Part 3 of Schedule 20 to that Act,
as those provisions would have had effect in relation to the carry back accounting period if the amendments made to them by section 55 of FA 2006 had not been made and the amendments made to them by this Act had not been made.