The International Convention on Load Lines, 1966, adopted by the International Conference on Load Lines on 5 April 1966, entered into force on 21 July 1968 and has been modified by the 1988 Protocol relating thereto and amended by Assembly and Maritime Safety Committee resolutions over the past 50 years.

This 2021 edition includes up-to-date, consolidated text in line with amendments adopted up to 1 July 2021, as well as updated unified interpretations that have been keyed to relevant articles and regulations.