LOTO tags are usually used in two ways: to identify the lock owner or, on an exception basis, to be used in the absence of a lock. In special cases where there is no lock, and a tag is the only option to isolate energy, OSHA requires that the tag must:
- Withstand the environment to which it is exposed
- Be standardized and distinguishable from other tags
- Include clear warnings and instructions
- Be a non-reusable, self-locking device that can withstand 50 pounds of pull force