In 2004, the MARPOL Annex VI Regulations for the Prevention of Air
Pollution from Ships were agreed upon and adopted. Regulation 14
of the annex established a stepwise reduction of permissible SOx
emissions. As of 1 January 2020, the global sulphur cap will be 0.5%
m/m, while the previously adopted limit of 0.1% m/m in Emission
Control Areas (ECAs) will remain in force.