5.1 When the duly authorized officer has clear
grounds that the ship does not comply with the provisions of chapter XI-2 and of part
A of the ISPS Code, or that the master or the ship's personnel
is not familiar with essential shipboard security measures and procedures,
a more detailed inspection as described in paragraphs 5.2 to 5.6 below, may be carried out. When carrying out a more detailed inspection,
the duly authorized officer should notify the master. However, it
should be noted that non-compliance with any topic referenced to part B of the ISPS Code may not necessarily
constitute a failure to comply with chapter
XI-2 or part A of the ISPS
Code.