20.—(1) A local authority must include in a secondary school’s budget share an amount equal to any sum notified to the local authority by the YPLA as being the allocation in respect of that school’s sixth form.
(2) A local authority may, in determining budget shares, use a factor which allocates funding in respect of sixth forms.
(3) A local authority may, in determining budget shares for schools with sixth forms, reduce the amount payable to each such school under their formula by a sum representing any element which has been duplicated in the YPLA’s allocation.
(4) A local authority must redetermine the budget share of a secondary school before the end of the funding period where the authority receive a written notification from the YPLA of a revised allocation in respect of the sum referred to in paragraph (1).