This section applies where—
Without prejudice to section 43(2) above but subject to section 43B below, where this section applies—
except where by virtue of any enactment it is irrevocable.
In subsection (2) above, "claim, election, application or notice" does not include an election under—
For the purposes of this section and section 43B below, a claim under Schedule 1AB is relevant in relation to an assessment for a year of assessment if it relates to that year of assessment.
For the purposes of this section and section 43B below, any other claim, election, application or notice is relevant in relation to an assessment for a year of assessment if—
The liabilities referred to in subsection (3) above are—
Where a claim, election, application or notice is made given, revoked or varied by virtue of subsection (2) above, all such adjustments shall be made, whether by way of discharge or repayment of tax or the making of assessments or otherwise, as are required to take account of the effect of the taking of that action on any person's liability to tax for any year of assessment.
The provisions of this Act relating to appeals against decisions on claims shall apply with any necessary modifications to a decision on the revocation or variation of a claim by virtue of subsection (2) above.