The SSS are designed so that staff who need to visit the location (to conduct train preparation, maintenance or other activities) have a site induction that identifies the location and any potential operational risks.  Although they have been designed to meet OTM operational requirements, SSS can be used by other railway operators.  However, the end user is responsible for ensuring their accuracy and that they meet their own task requirements.  Where an infrastructure manager or site owner has mandated its own location safety requirements, they must be applied in conjunction with any task specific requirements from the SSS.