An amendment numbered 4 printed in Part D of House Report 117-320 to strike all of the bill text and insert a provision establishing the Firefighter Special Claims Unit at the Department of Labor to process any claim relating to occupational disease filed by a federal firefighter. To direct GAO to submit a report describing any known barriers to the delivery of health care to federal firefighters, evaluating claims submitted by federal firefighters, and to provide information on the standard the Department uses to determine causation with respect to claims.