DNV

Commissioning testing in accordance with IMO guidance BWM.2/Circ.70/Rev.1 is now mandatory for Ballast Water Management Systems (BWMSs) installed on newbuilds and existing ships of all flag administrations when the initial BWMS commissioning survey is completed on or after 1 June 2022.

This test is required even if the system has been partially installed and/or commissioned before 1 June 2022.

Read more here...
https://www.dnv.com/news/mandatory-bwms-commissioning-test-required-from-1-june-2022-225958?utm_campaign=MA_22Q2_TRN_No_14_EXT_Mandatory%20BWMs%20Commissioning%20Test%20Required%20from%201%20June%202022&utm_medium=email&utm_source=Eloqua