NOx emissions from marine diesel engines are currently regulated through the Navigation Act, Marine order 503 (certificates of survey – national law) and Marine order 97 (marine pollution prevention – air pollution).

In coming months, we will be consulting with industry on some changes to help owners and operators of domestic commercial vessels (DCVs) comply with the NOx emission requirements.

After 15 December 2021, new or replacement engines with a power output above 130kW installed on DCVs must comply with the NOx emission standards. Valid engine international air pollution prevention (EIAPP) certificates and technical files will need to be kept on board.

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To make it easier for vessel owners to comply with the above requirements, we will amend Marine order 97 to:

  • Require that suppliers of marine diesel engines provide an EIAPP certificate and technical file for each marine diesel engine with a power output above 130kw sold for installation in Australia. 

Note: Owners and operators of DCVs and other vessels operating in Australian waters will still need to ensure they continue to purchase and install new and replacement engines that comply with the Tier II NOx emission limits and keep an EIAPP certificate (and technical file) on board for each engine.

  • Establish an alternative means of compliance for marine diesel engines installed on DCVs prior to 15 December 2021. This will allow DCV owners and operators to provide other acceptable evidence, instead of an EIAPP certificate and technical file, to demonstrate that installed engines are likely to comply with the NOx emission standards. 

Note: DCVs built overseas and delivered under their own propulsion as a regulated Australian vessel (RAV), or intending to undertake an overseas voyage (for example, for dry-docking) must carry on board an EIAPP certificate and technical file for each installed engine with a power output of greater than 130kW. There is no exemption from this requirement.

We will soon invite feedback from industry on the proposed changes through consultation on Marine order 97. 

An exemption is in place until these long-term measures are implemented.

We will soon invite feedback from industry on the proposed changes through consultation on Marine order 97.
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