10.1 Sub-hubco shall invoice the Authority for Capital Expenditure incurred by Sub-hubco to implement a Medium Value Change according to the payment schedule set out in the Estimate as referred to in paragraph 3.10.

10.2 The Authority shall make a payment to Sub-hubco within fifteen (15) Business Days of receipt by the Authority of invoices presented to the Authority (complete in all material respects) in accordance with paragraph 10.1 of this Section 3 accompanied by the relevant evidence (where applicable) that the relevant part of the Medium Value Change has been carried out.