Payment shall be made in accordance with the terms of a final apportionment, either directly or by way of reimbursement, to a school district for expenditures, or commitments therefor, which have been made by the district for any items approved by the board in the apportionment, provided, the construction contract has been let no earlier than two years preceding the date the application is received by the board. Where expenditures were made for, or work was commenced with respect to, any item so approved, prior to the time the application of such district containing

such item was received by the board, payment or reimbursement for the item, either with state funds or with district funds which the district is required to contribute by the apportionment, shall be made only upon authorization of the board by special resolution citing this section.