Isolating devices must be secured open or in the zero energy state so they cannot be operated inadvertently (an adaptor may be needed), and nobody may operate an isolator or use equipment carrying an isolation securing device. Where the isolator can be locked, the lock facility must be used. Securing devices need a deliberate action to fit or remove and can be a physical device (clip, screw, bolt, pin, padlock), a personal danger tag, a lockout or permit arrangement, or another system giving the same safety. Personal padlocks should be red, uniquely keyed and identify the owner by name, employer and contact number; a multi-lock device suited to the isolator must be used where more than one person locks on. Tags must be fixed with a lock, string or tie (never PVC tape), with legible permanent entries; permit systems use their own sign-on and tagging. Danger tags, which protect the individual, go at every point of switching, isolation or disconnection unless a padlock is used; warning or out of service tags go on equipment not to be operated except as the tag says. A danger tag comes off only with the signatory's permission or under a tag removal procedure; a warning or out of service tag only by a competent person given evidence the equipment is safe.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.