New codes that have been effective within the Paris MOU region since July 2011 have now also entered the implementation phase within the Tokyo MOU region. The new codes are structured into 17 main groups, compared to 31 groups in the previous deficiency coding system. There are three large groups, which are divided into sub-divisions: certificates and documents (three sub-divisions), working and living conditions (two sub-divisions), and pollution prevention (seven sub-divisions). After implementation, the new coding system willl be used in roughly 50,000 PSC inspections per year.

There is, however, a difference when it comes to ISM and ISPS deficiencies. While the Tokyo MOU links the deficiencies to the the relevant section of the ISM and ISPS codes, the Paris MOU has decided to keep one common deficiency for each of these two groups. The new reference codes can be found on corresponding MOU web site links:

Paris: https://www.parismou.org/Publications/Paris_MoU_deficiency_code_list/

Tokyo: http://www.tokyo-mou.org/Tokyo%20MOU%20deficiency%20codes.pdf