Under what circumstance is an employer not liable for an occupational injury?

The correct answer is based on the understanding of employer liability in relation to occupational injuries. An employer is not liable for an occupational injury when the injury is caused by lawful, nondiscriminatory actions taken by the employer. This situation may arise in cases where the employer's actions are within the scope of customary business practices and do not target or unfairly disadvantage the employee.

For example, if an employer enforces a policy regarding workplace safety that aligns with legal standards and is uniformly applied to all employees, and an employee sustains an injury as a result of that policy, the employer may not be held liable because the actions were appropriate and legally justified. This principle recognizes the balance between protecting employees from workplace hazards while also allowing employers to maintain operational standards effectively.

Understanding this context is crucial in navigating the complex nature of employer responsibilities and employee rights within occupational health frameworks.