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The Machinery Team of the Korean Register of Shipping released the present official Guidelines some years ago, namely in 2010. The world's traffic volume have drastically increased over the last several decades and it resulted in serious damages to the surrounding environment which was caused by invasive species contained in vessels' ballast water. As a final result of almost fifteen years of negotiations held between all of the IMO members, the BWM was adopted in 2004. There are still many questions that are relating to the installation of the BWTS, i.e. treatment systems, on ships, raised by shipyards and ship owners as the effective date of the Convention in question is approaching. However, it shall be taken into account as necessary, that subject Convention will enter into force only after it has been adopted by not less than thirty IMO members with their combined fleet not less than thirty-five percent of the combined gross tonnage of the world's merchant shipping. KR outlined all reference information for the selection and installation of such treatment systems by vessel type. These Guidelines shall be considered as interim ones and have been developed on the basis of the discussions by date. We do hope that the book would help the shipyard inspectors, ship owners and class surveyors in their day-to-day work.