(1) Subject to subsection (2), if the collecting agency is satisfied that an assessment was incorrect, the collecting agency may make a fresh assessment under section 16 in substitution for the incorrect assessment, even though levy or understatement penalty may have been paid in respect of the incorrect assessment.
(2) A fresh assessment may:
(a) if the incorrect assessment was based on false or misleading information given to the APVMA, an Agency specified by instrument under section 3A or an inspector--be made at any time; or
(b) otherwise--be made only within 4 years from the date on which levy became payable under the incorrect assessment.