Get trained to handle cargoes and dangerous goods, use an approved safety management system or become a vessel traffic service operator.
Links
[1] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/courses-cargoes-and-dangerous-goods
[2] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/cargoes-and-dangerous-goods-electronic
[3] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/cargoes-and-dangerous-goods-non-electronic
[4] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/dangerous-hazardous-and-harmful-cargoes
[5] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/how-become-coastal-pilot
[6] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/coastal-pilot-training
[7] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/check-pilots
[8] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/qualifications-and-training-vessel-traffic
[9] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/accredited-vessel-traffic-services-training
[10] https://www.amsa.gov.au/qualifications-training/safety-and-navigation-training/safety-management-system-workshops-domestic