The designated annual amount for a financial year is:
(a) if a determination in force under section 33C specifies the amount applicable to the financial year--that amount; or
(b) otherwise--$500 million.
Note: If no determination has been made under section 33C, the designated annual amount is indexed in accordance with section 33E. If a determination has been made under section 33C, the determination may provide for the designated annual amount to be indexed in accordance with the determination.