5.1 Each High Value Change Proposal and each High Value Change Stage 2 Submission shall be valid for a period of three (3) months from the date of its submission by Project Co.

5.2 If by the end of the three (3) month period referred to in paragraph 5.1 of this Section 4 (High Value Changes) the Authority has not:

5.2.1 in relation to a High Value Change Proposal, approved or rejected that High Value Change Proposal in accordance with the procedures set out in this Section 4 (High Value Changes):

(a) Project Co shall be entitled to withdraw the High Value Change Proposal; and

(b) Project Co shall not be entitled to any costs relating to the High Value Change Proposal unless the Authority has either not responded to the High Value Change Proposal and/or is in material breach of its obligations in paragraph 3 and/or paragraph 4.4 of this Section 4 in which case paragraph 8.5 of this Section 4 (High Value Changes) shall apply;

5.2.2 in relation to a High Value Change Stage 2 Submission, approved or rejected that High Value Change Stage 2 Submission in accordance with the procedures set out in this Section 4 (High Value Changes) (or has not given any notification of the Authority's response to the High Value Change Stage 2 Submission or has given written notice to Project Co withdrawing or cancelling the High Value Change to which the High Value Change Stage 2 Submission relates) then the High Value Change Stage 2 Submission shall be deemed to have been improperly rejected by the Authority and paragraph 8.5 shall apply.