81.10  Collateral Warranties

The Contractor shall:

81.10.1  deliver the Collateral Warranties from the [Construction Sub-Contractor, the Professional Team, Operating Sub-Contractor or any [specified] Sub-Contractor] to the Authority on the date of this Contract;

81.10.2  not engage any new or any replacement [Construction Sub-Contractor, the Professional Team, Operating Sub-Contractor or any [specified] Sub-Contractor] in connection with the Project unless such person has delivered to the Authority a duly executed agreement substantially in the form of the Collateral Warranty set out in Schedule 25 (Form of Collateral Warranty) duly executed as a deed and in each case such Collateral Warranties must be delivered to the Authority before such entity carries out or commences any of its obligations under the relevant contract or appointment.