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Compliance software for dangerous goods transport by sea

IMDG Code Amendment Cycle

Every two years IMO publishes a new Amendment to the IMDG Code, incorporating changes approved by the Maritime Safety Committee (MSC). This chart shows the sequence of these Amendments. The general principle is:

  • Each Amendment is valid for three years
  • There are alternating years for implementation
  • In January of the yellow years, a new Amendment is published and can be used immediately, subject to the timing of National Competent Authority adoption
  • Also, during the yellow years, the preceding Amendment can also be used, so it is an overlap period
  • In the green years only the current Amendment can be used.


amendment cycle 40-22