Due to the accession of the Bahamas the total number of contracting states to the treaty has reached 59, which represents 65.18 % of the global fleet by tonnage. This means that the convention will definitely enter into force on September 8, 2017.
The treaty requires for ballast water to be treated before it’s released. All ships in international trade have to manage their ballast water according to an approved ballast water management plan, carry a ballast water record book and an international ballast water management certificate. The standards will be phased in over a period of time. Until then ships should exchange ballast water mid-ocean. Eventually most ships need to install a ballast water treatment system which is approved by national authorities, according to a process developed by the International Maritime Organization (IMO).