Division 2.1.2 Functions of the braking system United Kingdom Original text. Later amendments are not shown. The braking system shall fulfil the following functions: 2.1.2.1Service braking system 2.1.2.2Secondary braking system 2.1.2.3Parking braking system ← Division 2.1.1.5 Division 2.1.2 Division 2.1.2.1 →