The Contractor shall then be entitled to payment of such
amount (if any) as the P.M. shall certify would have
been payable to the Contractor upon completion by him
of the Works after deduction of the amount certified in
clause 7.1.3. If the amount certified in clause 7.1.3
exceeds the amount the P.M. certifies would have been
payable to the Contractor upon completion by him of
the Works, the excess shall be recoverable by the
Employer from the Contractor as a debt.