2.7.  Excess Costs above the Appeal Contingency

2.7.1.  Where the Authority is required to indemnify the Contractor pursuant to paragraph 2.6 (Appeal Contingency) for [costs incurred over and above the amount of the Appeal Contingency ("Excess Costs")] the Authority shall reimburse the Contractor such Excess Costs together with any reasonable and proper financing costs subject to the Contractor providing satisfactory evidence to the Authority of such Excess Costs reasonably and properly incurred through any one of the following means the choice of such means to be in the Authority's absolute discretion:

(a)  by way of an adjustment to the Unitary Charge for all or some part of the remainder of the Services Period; or

(b)  by way of a lump sum payment made in one or more instalment together with an adjustment to the Unitary Charge; or

(c)  by way of a lump sum payment made in one or more instalments in respect of the whole amount,

such Excess Costs being calculated in accordance with the provisions of Schedule 21 (Change Protocol).

2.7.2.  Should the Authority specify the means by which any Excess Costs are to be paid, and so request in writing the Contractor shall provide such breakdown of costs as is reasonably practicable for each of the specified methods of payment.