41975mp4 May 2026

: Unlike earlier systems that allowed carriers to avoid liability by proving they took "all necessary measures," MP4 established a system of strict liability . The carrier is liable for damage or loss to cargo regardless of fault, with only a few specific exceptions (such as inherent defect in the cargo or an act of war).

Montreal Protocol No. 4 introduced several critical changes to aviation law:

In the insurance industry, "1975 MP4" is still referenced when discussing historical liability frameworks or policies that cover operations in countries that have not yet ratified the 1999 Montreal Convention. It remains a cornerstone for understanding the evolution of aviation risk management and legal disputes involving international air carriage. US Manual of International Air Carriage