The MSIC is a nationally consistent identification card which is issued to a person who has been the subject of a background check. It shows that the holder has met the minimum security requirements and needs to work unescorted in a maritime security zone.
The MSIC is not an access card and the relevant authority at each port or facility still controls access to its maritime security zones. MSICs are valid for up to four years, with a background check required every two years. Those requiring an MSIC may apply for a two year or four year MSIC.