This Standard describes requirements for rolling stock suspension. The main purpose of the requirements are to reduce the risk of hazards due to inadequate design or maintenance of suspension components. This Standard applies to new and modified locomotive, freight, passenger and infrastructure rolling stock. The Standard covers the design, construction and maintenance of rolling stock. Operation of rolling stock in regard to network safe working rules and route standards is not covered. The requirements in this Standard do not apply to infrastructure maintenance rolling stock that travel at 25 km/h or less. Rolling stock used on light rail, cane railway and monorail networks are not covered.