Worker's compensation: disabilities; presumption of causation of heart and respiratory diseases; extend to certain members of police, fire, and public safety departments. Amends sec. 405 of 1969 PA 317 (MCL 418.405).

This bill expands Michigan's workers' compensation rules to presume that certain heart and respiratory diseases are caused by work duties for a wider group of police, fire, and public safety employees. It specifically includes members of airport fire departments, county sheriff deputies, state police, conservation officers, and forest fire officers, alongside existing city and township personnel. Under the new provisions, these workers are automatically considered to have developed these conditions on the job unless there is clear scientific evidence that smoking or other non-work factors were the primary cause. The legislation also requires these individuals to apply for pension benefits before claiming workers' compensation for these specific illnesses.