The following new areas will require ships to comply with reduced emissions limitations: 

  • Mediterranean Sea (SOx) 
  • Canadian Arctic (NOx and SOx)
  • Norwegian Sea (NOx and SOx)

These ECAs are defined in the regulations and are illustrated below:


Mediterranean sea - In the above charts, the numbered points relate to the corresponding coordinates given in the regulations.


Canadian Arctic - In the above chart, the numbered points relate to the corresponding coordinates given in the regulations.


Norwegian sea - In the above chart, the numbered points relate to the corresponding coordinates given in the regulations.

Mediterranean Sea becomes a SOx ECA from 1 May 2025

From this date, amendments to MARPOL Annex VI Regulation 14.3.5, as amended by IMO Resolution MEPC.361(79), will prohibit ships operating within the Mediterranean Sea ECA from using fuel oils with a sulphur content exceeding 0.10% m/m unless an approved equivalent arrangement is used such as Exhaust Gas Cleaning Systems.

Canadian Arctic and Norwegian Sea become NOx ECAs from 1 March 2026

From this date, in accordance with MARPOL Annex VI Regulations 13, as amended by IMO Resolution MEPC.392(82), ships operating in either the Canadian Arctic ECA or Norwegian Sea ECA with a marine diesel engine with power output of more than 130kW are required to be certified to the NOx Technical Code 2008 to meet the NOx Tier III standard, as follows:

  • For the Canadian Arctic ECA, ships with keels laid or at a similar stage of 
    construction on or after 1 January 2025.
  • For the Norwegian Sea ECA:
    • Ships with a building contract placed on or after 1 March 2026
    • In absence of a building contract, ships with keels laid or at a similar 
      stage of construction on or after 1 September 2026; or
    • The delivery is on or after 1 March 2030

Canadian Arctic and Norwegian Sea become SOx ECAs from 1 March 2027

From this date, amendments to MARPOL Annex VI Regulations 14.3.6 and 14.3.7, as amended by IMO Resolution MEPC.392(82), will prohibit ships operating within either the Canadian Arctic ECA or Norwegian Sea ECA from using fuel oils with a sulphur content exceeding 0.10% m/m unless an approved equivalent arrangement is used such as Exhaust Gas Cleaning Systems.

LR advises that ship owners and ship operators are aware of three new Emissions Control Areas (ECAs) for nitrogen oxides (NOx) and sulphur oxides (SOx).

Ships operating in or entering the new SOx ECAs on or after their effective dates, will need to have on board sufficient compliant fuel oil (0.10% m/m maximum sulphur content) and bring it into use as required, or have installed and operate an approved alternative compliance mechanism, such as an Exhaust Gas Cleaning System.

Ships entering the new SOx ECAs before these dates, which intend to stay in them after the relevant ECA enters effect, will need to ensure that compliant fuel oil is brought into use no later than 00:00 hrs on the effective date. Lloyd’s Register recommends that this fuel change-over is recorded in the same way as if the ship was entering an ECA.

Existing ECAs

The existing NOx and SOx ECAs are as follows:

  • North American area
  • United States Caribbean Sea area
  • Baltic Sea area, and 
  • North Sea area 

For further information

For further information or advice, please get in touch with statutorysupport@lr.org.

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