“Clause 7. No payments shall be made for a work estimated to cost rupees two thousand five hundred or less till after the whole of the work shall have been completed and certificate of completion given. But in the case of a work estimated to cost more than rupees five thousand the contractor shall on submitting, the bill, be entitled to receive a monthly payment proportionate to the part thereof then executed to the satisfactory of the Engineer-in-Charge, whose certificate of the sum payable shall be final and conclusive against the contractor. But all such intermediate payments shall be regarded as payments by way of advance against the final payment only and not as payment of work actually done and completed, and shall not preclude the requiring of bad, unsound and imperfect or unskilled work to be removed and taken away and reconstructed, or re-erected or be considered as an admission of the due performance of the contract, or any part thereof in any respect or the accruing of any claim, not shall it conclude, determine, or affect in any way the powers of Engineer-in-Charge under these conditions or any of them as to the final settlement and adjustment of the accounts or otherwise or in any other way vary or affect the contract. The final bill shall be submitted by the contractor within one month of the date fixed for completion of the work or of the date of the certificate of completion furnished by the Engineer-in-Charge and payment shall be made within three months if the amount of the contract plus that of the additional items is upto Rs. 2 Lakhs and in 6 months if the same exceeds Rs. 2 Lakhs of the submission of such bill. If there shall be any dispute about any item or items of the work then the undisputed item or items only shall be paid within the said period of three months or six months as the case may be the contractor shall submit a list of the disputed items within thirty days from the disallowance thereof and if fails to do this, his claim shall be deemed to have been fully waived and absolutely extinguished”.