This bill seeks to amend title 5, United States Code, by adding Parkinson's disease to the list of illnesses and diseases presumed to be proximately caused by employment in fire protection activities. This legislative change would significantly impact firefighters, making it easier for those diagnosed with Parkinson's disease to establish a work-related connection for federal workers' compensation claims. The amendment specifically modifies section 8143b(b)(2) of title 5, United States Code, by inserting "Parkinson's disease" as a new subparagraph and re-designating the subsequent existing subparagraphs. This action acknowledges the growing concern about the potential link between the unique exposures of firefighting and the development of this debilitating neurological condition.