The South Korean national sulfur restrictions will apply to the following six ports, and a national sulfur emission control area for each port has been defined:

• Busan Port
• Incheon Port
• Ulsan Port
• Yeosu Port
• Gwangyang Port 
• Pyeongtaek-Dangjin Port

Beginning 1 September 2020, ships will initially have to turn to fuel oil that does not reach a sulphur content of 0.10 percent from one hour after completion of anchoring or mooring to one hour before completion of anchoring or de-berthing.

The criteria within the national sulfur emission control zones will be tightened from 1 January 2022 and ships will have to turn to fuel oil not exceeding a sulfur content of 0.10 percent from reaching a national sulfur emission control zone before they have left.

Maritime Business World