The Department of Home Affairs has released a guide that explains how to determine whether goods which have been imported to Australia are eligible for preferential rates of customs duty under the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (commonly known as TPP-11) as in force for Australia on 30 December 2018 in accordance with the Customs Act 1901 and the CPTPP rules of origin. You can read the guide at the link below:
https://www.abf.gov.au/free-trade-agreements/files/tpp-11-importers-guide.pdf