(a) (Interest): If the State fails to pay an amount of the State Contribution which is due and payable within the time required under clause 33.2(b), the State must pay interest on the unpaid amount at the overdue rate applicable under the Finance Documents calculated daily from the date referred to in clause 33.3(c) until the amount is paid. The amount of interest specified in this clause 33.3(a) will be Project Co's sole entitlement in respect of the late payment of all or part of the State Contribution, including interest or damages for loss of use of, or the cost of borrowing, money.
(b) (Refund): If the State pays the whole or any part of the State Contribution to Project Co and it is subsequently determined for any reason that the State has paid Project Co a greater amount than Project Co was entitled to receive, Project Co must immediately refund the relevant portion of that payment to the State (with interest calculated daily at the Overdue Rate).
(c) (Calculation): Interest under clauses 33.3(a) and 33.3(b) must be calculated on and from the day after payment of the relevant amount is due or determined to have been due.