Where a billing authority has set amounts for a financial year under section 30 above and at any later time—
it shall as soon as reasonably practicable after that time set amounts in substitution so as to give effect to those calculations or that precept.
Any amount set in substitution under subsection (1) above must be set in accordance with section 30 above, but subsection (6) of that section shall be ignored for this purpose.
Where a billing authority sets any amount in substitution under subsection (1) above (a new amount), anything paid to it by reference to the amount for which it is substituted (the old amount) shall be treated as paid by reference to the new amount.
If the old amount exceeds the new amount, the following shall apply as regards anything paid if it would not have been paid had the old amount been the same as the new amount—
Subject to any provision made by regulations under subsection (6) below, where an authority sets amounts in substitution under subsection (1)(a) above in the circumstances described in section 52ZO(6) or 52ZP(6) or (8) below, it may recover from the local precepting authority in question administrative expenses incurred by it in, or in consequence of, so doing.
Subject to any provision made by regulations under subsection (6) below, where an authority sets amounts in substitution under subsection (1)(b) above, it may recover from the major precepting authority administrative expenses incurred by it in, or in consequence of, so doing.
The Secretary of State may by regulations make provision for cases in which—