What is Chain Of Responsibility?

Legal Definition
The chain of responsibility is a policy concept used in Australian transport legislation to place legal obligations on parties in the transport supply chain or across transport industries generally. The concept was initially developed to apply in the heavy vehicle industry in regulated areas such as speeding, fatigue and mass, loading and dimension. It has since spread to other transport sectors, particularly in Victoria where it has been applied in laws which apply to the rail, bus, marine and taxi industries.
-- Wikipedia