calculate the amount per pupil (within the meaning of paragraph 16A to D of Schedule 4) which would be required, if the amount of the CFF share of each grant-maintained secondary school situated in the area of the relevant authority concerned and each secondary school maintained by them were to be redetermined in accordance with that Schedule (but substituting for the amount per pupil referred to in that paragraph in relation to the authority the recalculated amount per pupil), to produce within the secondary schools total for the authority for the financial year in question the amount (referred to below as the “supplementary amount”) required to permit the amount of the CFF share of each school which is less than the amount of its CFF floor or which would be less than that amount if the amount of the CFF share of each school were to be redetermined as aforesaid, to equal the amount of the school’s CFF floor, by adding a share of the supplementary amount to the amount of the school’s CFF share;

redetermine the amount of the CFF share of each grant-maintained secondary school situated in the area of the relevant authority concerned and each secondary school maintained by them in accordance with Schedule 4 but substituting for the amount per pupil referred to in paragraph 16A to D of that Schedule the amount calculated in accordance with sub-paragraph (a) above; and

add to the amount of the CFF share (as so redetermined) of each school which is less than the amount of its CFF floor the amount by which the latter amount exceeds the former amount.