Published on Australian Maritime Safety Authority (https://www.amsa.gov.au)



Marine order 504 - Certificates of operation - national law

Understand the legal requirements for domestic commercial vessels operating in Australian waters, including certificates of operation, crewing, and safety management systems.

Updated MO504
An updated version of Marine Order 504 came into effect on 1 June 2025. Read more about the changes.

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Marine order 504 includes: 

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Last updated: 30 May 2025