8.5 Where this paragraph 8.5 applies (as set out in paragraph 5.2.1(b), paragraph 5.2.2 paragraph 8.2.2(b) and paragraph 16.4.1)), the Incurred Change Management Fee and Third Party Costs incurred by Sub-hubco to prepare the High Value Change Proposal and Stage 2 Submission, which shall be in accordance with the activities and budget referred to in paragraph 3.4.4 of this Section 4 (High Value Changes), in relation to the relevant High Value Change will be paid by the Authority within ten (10) Business Days of the date on which Sub-hubco receives written notice of the rejection or the date of the deemed rejection (as the case may be) with the date of the rejection or the deemed rejection (as the case may be) being the Calculation Date for the purposes of calculating the amount of the Incurred Change Management Fee (unless a different Calculation Date is expressly stated in this Section 4 (High Value Changes) in relation to the circumstances giving rise to the entitlement of Sub-hubco to be paid the Incurred Change Management Fee).