Failure on any of these points, as referenced back to the standard, means your safeguard is illegal under most global health and safety regulations (including OSHA in the US and PUWER in the UK).
It is harmonized with ISO 13849-1 (PL) and IEC 62061 (SIL), ensuring that devices developed to this standard meet necessary safety integrity requirements [2]. iec 61496-1 pdf