还没有.离35％还早.
The “International Convention for the Control and Management of Ships' Ballast Water and Sediments (BWM)” will come into effect 12 months after at least 30 countries representing 35 per cent of the combined tonnage of the global commercial fleet have ratified the convention. But that condition has not been met to date. While 35 countries had signed the convention by 31 July 2012 according to IMO, these nations account for only 27.95 per cent of the global tonnage, falling short of the required quorum.
