2.46 There are a significant number of other issues which will need to be considered, including:
• the impact of the change on the risk profile;
• the interface between the new construction works and the existing contract, including any relaxation of performance measures during construction;
• drafting of an amending agreement to the main Project Agreement;
• changes to the payment mechanism, if appropriate, to make sure that any new services or works are delivered appropriately and that the contractor is incentivised to do so.
• construction sub-contractor collateral warranties;
• new/revised schedules covering the design and construction specifications;
• termination / default issues.
2.47 The implementation of high value changes involving change to the assets should be treated as a project in itself and Authorities will almost certainly need to engage legal and financial advisers to ensure that the change is well managed. Ideally, the legal and financial advisers employed for the original contract negotiations will have been retained by on a "call-off" basis and can be used.