1) The document discusses regulations for reducing air pollution from ships, known as MARPOL Annex VI. It outlines the ratification process and key emission types regulated.
2) MARPOL Annex VI sets limits on emissions of nitrogen oxides, sulfur oxides, particulate matter, and other pollutants from ship exhausts, with stricter tiers that became effective in 2000, 2011, and 2016.
3) The regulations require certification and testing of ship and engine designs to verify compliance with emission limits.