- WILLFUL: A willful violation is defined as a violation in which the employer either knowingly failed to comply with a legal requirement (purposeful disregard) or acted with plain indifference to employee safety.
- SERIOUS: A serious violation exists when the workplace hazard could cause an accident or illness that would most likely result in death or serious physical harm, unless the employer did not know or could not have known of the violation.
- REPEATED: A company may be cited for a repeated violation if the company has been cited previously for the same or a substantially similar condition and, for a serious violation.
- OTHER-THAN-SERIOUS: A violation that has a direct relationship to job safety and health, but is not serious in nature, is classified as "other-than-serious."
Ignorance of OSHA Regulations Is No Defense, Circuit Court Rules