The Australian Maritime Safety Authority (AMSA) has announced that the updated Marine Order 16 (Load Lines) 2025 (MO16) and Marine Order 19 (Tonnage Measurements) 2025 (MO19) have taken effect on 1 September 2025 as apart of its new regulations on load lines and tonnage. According to AMSA’s latest update, the revisions aim to align Australia’s maritime regulations with international standards, supporting safer and more effective operations in domestic and international waters.
The updated orders will apply to:
- Owners and operators of recreational commercial vessels (RAVs)
- Owners and operators of domestic commercial vessels (DCVs)
- Foreign vessels operating in Australian waters
About MO16 and MO19
MO16 implements the International Convention on Load Lines, establishing requirements for:
- Vessel certification as proof of survey and compliance with the convention
- Vessel load line markings
- Determining when a vessel is considered overloaded
MO19 enforces the International Convention on Tonnage Measurement of Ships, primarily governing vessel certification as proof of compliance.
Key updates
- Commercial yachts: Clarifies that an Australian recreational vessel operating as a commercial yacht becomes classified as a RAV and is subject to MO16 and the International Convention on Load Lines.
- International Tonnage Certificates: AMSA or a recognised organisation (RO) can now issue International Tonnage – Certificates to eligible Australian-flagged recreational vessels.
- Domestic commercial vessels: DCV owners are now able to apply for an International Tonnage Certificate.
- Improved clarity: Updates to both orders include simplified language, corrections, and alignment with other contemporary marine orders, making them easier to understand and apply.
Vessel owners and operators are encouraged to review the updated orders in view of their implementation on 1 September 2025.
View marine order 16 – Load Lines
View marine order 19 – Tonnage Measurements