Title 8 CCR §3314 (Cleaning, Repairing, Servicing, and Adjusting of Prime Movers, Machinery and Equipment) requires which key element of an effective lockout/tagout program?

Explanation

Section 3314 requires documented hazardous-energy-control procedures, identification and isolation of every energy source, a lock or tag applied by each authorised employee - so the person inside the machine holds the key to their own protection - verification that the energy is at zero before work begins, training for authorised and affected employees, and periodic inspection. Each wrong answer keeps a fragment and loses the control. A verbal warning (a) protects nobody who was not listening. A single padlock applied by the foreman (b) leaves the servicing worker dependent on somebody else's memory, which is exactly what the individual-lock rule exists to prevent. And tags alone (c) are permitted only where the energy-isolating device cannot accept a lock: a tag is a warning, not a physical barrier, and its colour has nothing to do with whether it is lawful.