The document discusses regulations to reduce vessel air emissions along coasts in North America. It summarizes the adoption of the North American Emission Control Area in 2010, which aims to reduce sulphur oxides by 96% and nitrogen oxides by up to 80% through stringent standards for vessel emissions. Key dates are provided for implementing reduced sulphur levels in fuel and tighter restrictions on nitrogen oxide emissions from vessels. The document also reviews technical options for vessels to comply with emissions standards through low-sulphur fuel or emissions control systems.