For merchant ships Resolution MSC.337((91) is in force. This resolution concerns the code on noise levels on board ships and is applicable on ships of a gross tonnage of 1600 and above, built on or after this date.
Contrary to Resolution A.468(XII), the new code is compulsory on the basis of SOLAS II-1/3-12. For Dutch flagged vessels Resolution A.468(XII) will remain in force regardless of their gross tonnage if they are built before 1 July 2014 and for vessels with a gross tonnage less then 1600 if they are built on or after 1 July 2014. For the time being Resolution A.468(XII) will also remain in force for dredgers with propulsion and high-speed vessels with a gross tonnage of 1600 and above, if they are built on or after 1 July 2014, because they are excepted from the new code.
For further information see the document below.