According to OSHA regulations, employers are also required to train each worker and ensure that they know, understand, and are able to follow the applicable provisions of the hazardous energy control procedures. Workers must be trained in the purpose and function of the energy control program and have the knowledge and skills required for the safe application, usage and removal of the energy control devices.

OSHA claims compliance with the lockout-tag-out standard prevents an estimated 120 fatalities and 50,000 injuries each year.

"OSHA requires that employers assign each authorized employee a standardized lock with a single key for locking out equipment. They must also maintain documentation on file that lists the specific lock assigned to each employee and must keep duplicate keys in a secured location for emergency use only. While the equipment is locked out, the employee whose key locked the machinery must retain the key in his or her possession at all times, and only the person who applied the lock is authorized to remove it," Garcia said.

He said OSHA requires employers to review lockout-tag-out procedures annually to ensure the program’s continued effectiveness, and they must conduct reviews with all employees who are authorized to lockout equipment. Employers should also review tag-out procedures with all authorized employees, as well as those workers whose jobs are affected by lockout-tag-out procedures.