An indexation amount exists in relation to the contract at a particular time ( the relevant time ) if:
(a) subsection 12X(3) applied for the purpose of working out the amount outstanding under the contract at the relevant time; and
(b) the amount outstanding under the contract at the relevant time exceeds the amount worked out using the formula:
;
and the amount of the excess constitutes the indexation amount in relation to the contract at the relevant time.