7.  PROCEDURE

7.1.  The Base Case shall be revised by the Contractor in accordance with the provisions of this Schedule 19 within fifteen (15) Business Days of the Base Case Change Date.

7.2.  If the Base Case is to be revised:

7.2.1.  the Contractor shall withdraw one (1) electronic copy of Base Case from the Custodian in order to make appropriate electronic amendments to it to enable the Contractor to effect the subsequent revisions;

7.2.2.  the Contractor shall at its own cost, save as otherwise expressly provided, revise the Base Case and submit to the Authority the revised Base Case for approval (such approval not to be unreasonably withheld).

7.3.  The revised Base Case produced pursuant to paragraph 6.2 shall, when it is approved by the Authority (such approval not to be unreasonably withheld), become the Base Case for the purposes of this Contract until its further amendment in accordance with this Contract.

7.4.  The Contractor shall ensure that each iteration of the Financial Model is provided with a unique reference number and date.

7.5.  The costs of undertaking a revision of the Base Case shall be treated as a project cost in respect of all Relevant Events and (for the avoidance of doubt) shall be incorporated within the revised inputs associated with the revisions to the Financial Model as a result of such Relevant Event.

7.6.  Where practicable, the Contractor shall use all reasonable endeavours to carry out revisions to the Unitary Charge at the end of a Contract Year in order that the revised Unitary Charge may take effect at the beginning of the next Contract Year.

7.7.  Following agreement of the revised Base Case, the Contractor shall:

7.7.1.  promptly deliver a copy of the revised Base Case to the Authority in accordance with the provisions of paragraph 3.2;

7.7.2.  return a copy of the revised Base Case to the Authority, having observed the necessary version control in accordance with paragraph 6.4 and the necessary revisions to the Unitary Charge to be made in accordance with this Schedule 19; and

7.7.3.  the necessary adjustments to the Unitary Charge shall be made from the Base Case Change Date but any upward revisions of the Unitary Charge shall not be due and payable until the copies of the revised Base Case have been returned to the Custodian and a copy provided to the Authority.

7.8.  Unless otherwise agreed by the Parties in writing, the Contractor shall not be permitted to backdate any increase in the Unitary Charge as a result of a Change.

7.9.  If the Contractor does not perform the revisions required by, and in accordance with this Schedule 19, the Authority may do so and determine the revised Unitary Charge accordingly.  All costs incurred by the Authority in doing so shall be paid by the Contractor.