This section applies if there is any alteration in a company's adjusted ring fence profits for an accounting period after this Chapter has effect in relation to the profits.

Any necessary adjustments to the operation of this Chapter (whether in relation to the profits or otherwise) are to be made (including any necessary adjustments to the effect of section 356JG on the profits or to the calculation of the amount to be carried forward under section 356JGA).

The Treasury may by regulations substitute a different percentage for the percentage that is at any time specified in section 356JF(2) (calculation of allowance as a percentage of investment expenditure).

Regulations under subsection (1) may include transitional provision.