The International Ship and Port Facility Security Code (ISPS Code) is a comprehensive set of measures to enhance the seccurity of ships and port facilities, developed in response to the perceived threats to ships and port facilities in the wake of the 9/11 attacks in the United States. The ISPS Code is implemented through chapter XI-2 Special measures to enhance maritime security in the International Covention for the Safety of Life at Sea (SOLAS), 1974. The Code has two parts, one mandatory and one recommendatory.

In essence, the Code takes the approach that ensuring the security of ships and port facilities is risk management activity and that, to determine what security measures are appropriate, an assessment of the risks must be made in each particular case. The purpose of the Code is to provide a standardised, consistent framework for evaluating risk, enabling Governments to offset changes in threat with changes in threat with changes in vulnerability for ships and port facilities through determination of appropriate security levels and corresponding security measures.