Border section

A border section is a special section between two IM’s. The problem is the differences between IM responsibilities. Some border sections can have different definitions of where the responsibility lies. This is the: • Legal responsibility between IM’s for interoperable traffic. The network border is a point where legal responsibility changes between the IMs (this is the handover point). This can be but does not have to be in conjunction with a state border. • Timetable responsibility between IM’s for interoperable traffic. This is the point where there is a change to the timetable responsibility. This can be a mutual border point agreement between the IM’s.