A comparative study was made on seismic design of port and harbour structures based on Chinese code, US guidelines and Japanese standards as well as guideline of International navigation association. This is the second of the series papers. The philosophy, performance objectives, hazard levels of seismic design and classification of marine structures specified in these codes were analyzed. It is shown that all the codes except Chinese code are multi-performance objectives and multi-hazard levels for seismic design, and different classifications are made per the consequence of collapse of structure under earthquake.