This is the second edition of CSA Z259.12, and specifies design and performance requirements, test methods, and requirements for marking and labeling individual connecting components used as part of a personal fall arrest system (PFAS). This Standard applies to components that are: used in the interconnection of a complete PFAS unit in accordance with CSA Z259.10; intended to be used as the primary single link to a permanent anchorage connector; or intended to be used as a primary attachment point between two or more subsystems. It does not apply to anchorages or anchorage connectors.