The placement of a Lock Out Device including a padlock on the Energy Isolating Device of a piece of equipment, machinery, or system. The placement is done in accordance with the department’s established procedures to ensure the energy isolation device and equipment being controlled cannot be operated until the lock out device is removed. Only the Authorized Person who placed the lock on can remove it at the completion of the job. Procedures must include those conditions when personnel other than the Authorized Person can also be affected by accidental release of hazardous energy. An example would be multiple personnel performing work activities in a controlled space (e.g., electrical power has been secured to a work area, equipment, machinery, or system). During Lock Outs by multiple personnel, the equipment, machinery, or system must remain secured until the last Authorized or Affected personnel has completed their work task and has removed their lock.