5  Payment

5.1  Following the implementation of a Low Value Change, the Contractor shall include the costs of any Low Value Change in the next [Draft Monthly Payment Report] following completion or implementation of the relevant Low Value Change.  

5.2  No adjustment of the Unitary Charge shall be made as a result of any Low Value Change unless agreed between the parties.  Where it is agreed that an adjustment of the Unitary Charge is required, the Base Case shall be adjusted to give effect to such Low Value Changes once each Payment Year and all relevant Low Value Changes that have occurred in the preceding Payment Year shall be aggregated together into a single cumulative adjustment as set out in Schedule ♦ (Revision of Base Case & Custody).