The 2010 Manila Amendments to the STCW Code bring in the requirement for engineers to undergo education and training in High Voltage systems, at both the operational and management levels. This requirement comes into force on 1 January 2017 and will also affect the revalidation of Engineering Certificates of Competency (CoC) from 1 January 2012. At the operational level, to avoid having the High Voltage limitation, Engineer Officers of the Watch will need to show compliance with the 2010 Manila Amendments. In addition to the current revalidation requirements, they will have to provide documentary evidence of completion of High Voltage (HV) course or completion of sea service in the engine room on vessels fitted with HV systems.