You can do this, but it would be by either :
- when the Subcontractor's subcontract term finishes i.e. the the end of the 'service period'; or
- via the termination procedures of the contract : this would be expensive as it would be for a reason other than those listed and consequently, the termination payment would include amount A4 which is for "The direct fee percentage applied to ... any excess of the total of the Prices at the Contract Date over the Price for Services Provided to Date"
- when the Subcontractor's subcontract term finishes i.e. the the end of the 'service period'; or
- via the termination procedures of the contract : this would be expensive as it would be for a reason other than those listed and consequently, the termination payment would include amount A4 which is for "The direct fee percentage applied to ... any excess of the total of the Prices at the Contract Date over the Price for Services Provided to Date"