05.2.1 – Requirements for Lockout Devices

All lockout devices (including all tags used with lockout devices) shall 

1. be uniquely identified; (usually serial number)
2. be the only devices used for controlling hazardous energy; 
3. not be used for other purposes; 
4. be capable of withstanding the environment to which they are exposed; 
5. be standardized within the facility (or company) in at least one of the following criteria:
   A. colour;
   B. shape;
   C. size; or
   D. specific markings; and 
   
6. be substantial enough to prevent the operation of the energy-isolating device without excessive force, unusual measures, or destructive techniques, e.g., bolt cutters or other metal-cutting tools.
   

An information tag shall be used with each lockout device unless the lockout device itself has the required information attached. 

Each lockout device, and tag if used, shall identify the authorized individual who applied the device and may include the date and reason for lockout – and remain legible for the duration of use.