Your ICA arrangement will be audited by the department before you are approved as an accredited certifier. Audits systematically examine your business processes, staff, equipment and facilities to verify that it meets the requirements of the operational procedure covering the ICA arrangement.
If an ICA does not exist for your produce, you will need to check the entry condition for the state or territory where you would like to send your produce, and the regulators in the state or territory where the produce is grown, in order to get a PHAC.