Amendments to an international treaty aiming to prevent the spread of potentially invasive species in ships’ ballast water entered into force on 13 October 2019. The amendments set out an implementation schedule to make sure that ships manage their ballast water to meet a specified standard (D-2 standard). They also make mandatory the Code for Approval of Ballast Water Management Systems, which establishes how ballast water management systems used to achieve the D-2 standard have to be assessed...
https://safety4sea.com/bwm-convention-d-2-standard-enters-into-force/