对所有以前的期中付款证书中证明的款额的扣除。

The deduction of amounts certified in all previous Interim Payment Certificates.

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根据本条(c)款的规定，并且在需要时通过对《合同总价进度计划》的调整，在《期中付款证书》中使对变更的测量和估价生效。

Effect shall be given to the measurement and valuation of variations under sub-clause (c) of this clause in Interim Certificates and by adjustment, if required, of the Contract Sum Project Schedule.

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